The Best AI Firefox Extensions, Ranked by Real Data
A transparent, data-driven directory of AI Firefox extensions - ranked by daily active users, rating, and review volume, not by who paid for placement. Rebuilt weekly from Mozilla Add-ons.
Curated & maintained by Alston Antony · 15+ yrs SEO, 500+ tools tested What Is an AI Firefox Extension, and How Do You Install One?
What it is
An AI Firefox extension adds AI capabilities - chat, writing help, summarization, translation - directly into your browser, usually as a sidebar, toolbar button, or right-click menu, instead of needing a separate tab or app. Every add-on here is distributed through Mozilla Add-ons (AMO).
How to install one
Open the add-on's Mozilla Add-ons link from the directory below, click "Add to Firefox," and confirm the permissions prompt. The extension's icon then appears in your toolbar, where you can pin or manage it. Look for the green Recommended badge for add-ons Mozilla has extra-reviewed.
A transparent, data-driven directory of AI Firefox extensions - ranked by daily active users, rating, and review volume, not by who paid for placement. Rebuilt weekly from Mozilla Add-ons. How we choose and rank →
The best AI Firefox extensions as of July 18, 2026, ranked by our composite Quality Score (adoption, rating, review trust):
- Grammarly: AI Writing and Grammar Checker App - Language & Translation, 4.1/5 from 3,209 reviews, quality score 94/100.
- DeepL: AI translator and writing assistant - Language & Translation, 4.2/5 from 1,027 reviews, quality score 84/100.
- 划词翻译 - Language & Translation, 4.3/5 from 334 reviews, quality score 71/100.
- Page Assist - A Web UI for Local AI Models - Other, 4.7/5 from 76 reviews, quality score 62/100.
- Simplify Copilot - Autofill job applications - Other, 4.2/5 from 142 reviews, quality score 61/100.
AI Firefox Extensions, By the Numbers
Highest-rated with a real review base: ChatGPT in Sidebar (5.0/5). Most installed: Grammarly: AI Writing and Grammar Checker App (523.4k daily users). Also run Chrome? See our AI Chrome extensions leaderboard, scored the same way.
Every AI Firefox Extension, Ranked
All 94 AI Firefox extensions in this build, scored on a transparent composite of adoption, rating, and review volume. Filter by category, minimum rating, or Mozilla-Recommended status, sort by any column, and expand any row for the full breakdown and store link.
| # | Extension | Rating | Users | Trend | Quality | Store link |
|---|---|---|---|---|---|---|
| 1 | 523.4k | 94 | View → | |||
| Grammarly: AI Writing and Grammar Checker App has a 4.1/5 rating from 3,209 reviews and 523.4k daily users, by Grammarly. Our take: The default pick for most people. The free tier alone catches the errors that matter; the paid tier is really about tone and rewriting, not correctness. Works the same on Firefox as Chrome. From blank page to polished draft, Grammarly’s AI helps you write faster and stronger. Get real-time grammar fixes, tone transformations, and instant content generation right where you write in Firefox. | ||||||
| 2 | 167.2k | 84 | View → | |||
| DeepL: AI translator and writing assistant has a 4.2/5 rating from 1,027 reviews and 167.2k daily users, by DeepL. Our take: The translation quality is the reason to install this over a generic translator. Free tier is generous for occasional use; the writing-assistant side is newer and less essential than the core translate. Stay informed, work smarter, and communicate globally without leaving your browser. | ||||||
| 3 | 28.3k | 71 | View → | |||
| 划词翻译 has a 4.3/5 rating from 334 reviews and 28.3k daily users, by 划词翻译. 一站式划词 / 截图 / 网页全文 / 音视频 AI 翻译扩展，支持谷歌、DeepL、ChatGPT、百度等 9 个国内外主流翻译服务，均可用于全文翻译。能在 PDF 里使用。支持辅助键、快捷键、悬浮取词。 | ||||||
| 4 | 9.7k | 61 | View → | |||
| Simplify Copilot - Autofill job applications has a 4.2/5 rating from 142 reviews and 9.7k daily users, by Simplify. The better way to job search. Quick apply and autofill job applications in one click. Track jobs, companies, contacts, resumes & more! | ||||||
| 5 | 9.6k | 60 | View → | |||
| ChatGPT to PDF has a 4.4/5 rating from 50 reviews and 9.6k daily users, by PDFCrowd. Turn your chats into neatly formatted PDF. | ||||||
| 6 | 8.9k | 62 | View → | |||
| Page Assist - A Web UI for Local AI Models has a 4.7/5 rating from 76 reviews and 8.9k daily users, by Muhammed Nazeem. Our take: The standout for privacy-minded users: it gives you a chat UI for local models (Ollama and friends) so your prompts never leave your machine. Needs a local model running, so it is not a plug-and-play pick for everyone. Use your locally running AI models to assist you in your web browsing. | ||||||
| 7 | 7.6k | 53 | View → | |||
| Copilot Launcher Button has a 4.0/5 rating from 18 reviews and 7.6k daily users, by SYS64738. A very simple launcher that adds a Copilot button to the toolbar. When you click the button, the Microsoft Copilot website will open in a new tab. | ||||||
| 8 | 7.5k | 55 | View → | |||
| WebChatGPT: ChatGPT with internet access has a 3.7/5 rating from 107 reviews and 7.5k daily users, by Extensions Hub. Our take: Adds live web results and a prompt/preset library to ChatGPT. Genuinely useful, but it is a companion to ChatGPT, not a standalone assistant. Check permissions before installing any ChatGPT add-on. Augment your ChatGPT prompts with relevant web search results through web browsing. | ||||||
| 9 | 7.4k | 55 | View → | |||
| AI Side Bar Go has a 4.2/5 rating from 21 reviews and 7.4k daily users, by Landy. Ask any question about the page you visit with Claude AI in the sidebar. | ||||||
| 10 | 6k | 56 | View → | |||
| Ui.Vision has a 4.3/5 rating from 51 reviews and 6k daily users, by Ocr.Space (Free OCR API). Open-source Ui.Vision is RPA software for task & test automation. It is 3 tools in 1: Visual BROWSER automation with Selenium IDE import/export, 2: Visual DESKTOP automation and 3: (optional) Prompting with integrated Anthropic Claude Computer Use | ||||||
| 11 | 6.0k | 51 | View → | |||
| ChatGPT in Sidebar has a 4.1/5 rating from 14 reviews and 6.0k daily users, by semanticdata. Displays ChatGPT in the sidebar, provides customizable keyboard shortcut and toggle button. | ||||||
| 12 | 4.9k | 53 | View → | |||
| AI Subtitles & Immersive Translate - Trancy has a 4.0/5 rating from 62 reviews and 4.9k daily users, by Trancy. Our take: Best-in-class for bilingual subtitles and inline video/page translation while you learn a language. Freemium, and the free limits are enough to try before you commit. Trancy provides bilingual subtitle for platforms like YouTube, Disney+... as well as AI translator for websites. | ||||||
| 13 | 4.6k | 40 | View → | |||
| YouTube Summary with ChatGPT & Claude has a 2.5/5 rating from 27 reviews and 4.6k daily users, by Glasp. Summarize YouTube videos, web articles, and PDFs to save time, powered by ChatGPT, Claude, Mistral AI, and Gemini. | ||||||
| 14 | 4.4k | 58 | View → | |||
| chessvision.ai Chess Position Scanner has a 4.8/5 rating from 79 reviews and 4.4k daily users, by Pawel Kacprzak. Analyze chess positions from any website, book, and video in Firefox | ||||||
| 15 | 4.2k | 56 | View → | |||
| Freespoke - AI Search Tool has a 4.6/5 rating from 46 reviews and 4.2k daily users, by Freespoke.com. The AI Search Tool for Finding Truth. Make Freespoke your default search experience. | ||||||
| 16 | 3.9k | 53 | View → | |||
| YouTube to NotebookLM - YouTube to Gemini Notebook has a 4.8/5 rating from 15 reviews and 3.9k daily users, by Dima. Send YouTube to NotebookLM. Save videos, sync YouTube channel to NotebookLM, and manage any NotebookLM video easily | ||||||
| 17 | 3.9k | 55 | View → | |||
| AI Toolbox has a 4.6/5 rating from 52 reviews and 3.9k daily users, by Arash Yoosefdoost. Ultimate AI assistant! Access all AIs anywhere and boost your productivity: ChatGPT, Gemini, DeepSeek, Grok, Copilot, Claude, Llama, Qwen, Mistral AI, Perplexity, Poe, Narrow AIs and much MORE! 💖 No user information is collected by the developer | ||||||
| 18 | 3.9k | 51 | View → | |||
| AI Exporter - Gemini to PDF & Sync to Notion has a 4.1/5 rating from 40 reviews and 3.9k daily users, by Colin. Export conversations from 10+ AI platforms, including ChatGPT, Claude, Gemini, Google AI Studio, Perplexity, Grok, DeepSeek, and more. Save as PDF, image, TXT, Markdown, or export directly to Notion - with one-click export and conversation selection. | ||||||
| 19 | 3.9k | 45 | View → | |||
| Gemini for Google has a 3.5/5 rating from 17 reviews and 3.9k daily users, by tudoujun. A browser extension to display Gemini (Google's AI model, currently free) response alongside Google and other search engines results. Supported Search Engines: Google, Baidu, Bing, DuckDuckGo, Brave, Yahoo, Naver, Yand | ||||||
| 20 | 3.8k | 49 | View → | |||
| ChatGPT Reader & Transcriber: Free AI Text↔Speech has a 3.9/5 rating from 36 reviews and 3.8k daily users, by Democratic Developer. Free AI text to speech (tts) and speech to text (stt) with ChatGPT. Listen to natural voices or transcribe audio instantly. Free alternative to sites like ElevenLabs, Speechify, Rev, Otter.ai or other text to speech/transcription services | ||||||
| 21 | 3.7k | 45 | View → | |||
| Claude has a 3.9/5 rating from 7 reviews and 3.7k daily users, by Claude Search. Ask Claude AI from your address bar. Summarize pages, answer questions, brainstorm ideas, and more. Claude AI, ChatGPT alternative, AI productivity. | ||||||
| 22 | 3.5k | 53 | View → | |||
| Speed Booster for ChatGPT: Fix Lag in Long Chats has a 4.4/5 rating from 43 reviews and 3.5k daily users, by BGSN. Stop browser freezing and lag in long ChatGPT conversations. Instantly speeds up the entire UI and reduces memory usage. | ||||||
| 23 | 3.4k | 52 | View → | |||
| Gemini Voyager has a 4.7/5 rating from 14 reviews and 3.4k daily users, by Nagi-ovo. Supercharge your Gemini experience with timeline navigation, folder organization, prompt library, and chat export. | ||||||
| 24 | 3.4k | 57 | View → | |||
| Definer: Word Translator, Ask AI, Popup Dictionary has a 4.6/5 rating from 142 reviews and 3.4k daily users, by Lumetrium. Use AI translator and dictionary online with AI search to spell check sentences & learn new words | ||||||
| 25 | 3.2k | 50 | View → | |||
| ChatGPT Export has a 4.2/5 rating from 32 reviews and 3.2k daily users, by Enes Saltik. Just simply export your ChatGPT conversations as HTML, without sending them to "trusted" PDF converters. | ||||||
| 26 | 3.2k | 55 | View → | |||
| Complexity | Perplexity AI Supercharged has a 4.8/5 rating from 48 reviews and 3.2k daily users, by Duong Pham Ngoc. Power-user toolkit: Quick model switching, custom themes, enhanced code blocks, export tools, and 20+ productivity features for Perplexity AI. | ||||||
| 27 | 3.2k | 55 | View → | |||
| Claude Usage Tracker has a 4.8/5 rating from 30 reviews and 3.2k daily users, by lugia19. Helps you track your claude.ai usage caps based on tokens sent, and syncs across devices using firebase. | ||||||
| 28 | 3k | 46 | View → | |||
| ChatGPT Sidebar for Fire Fox has a 3.8/5 rating from 21 reviews and 3k daily users, by HamzaDev. Use ChatGPT in sidebar. You won't need to waste time switching between ChatGPT and other tabs. | ||||||
| 29 | 3k | 50 | View → | |||
| Voila - AI Assistant, Copilot and AI Writer has a 4.2/5 rating from 30 reviews and 3k daily users, by Browser extensions. Seamless personal AI assistant powered by GPT-4o to help you create, write, summarize, brainstorm, and research Get things done with a simple keyboard shortcut - Improve your writing, get answers to all your questions and draft high-quality content. | ||||||
| 30 | 2.8k | 51 | View → | |||
| Gemini has a 4.8/5 rating from 12 reviews and 2.8k daily users, by AI Allstar. Ask Google Gemini AI directly from the address bar. Ask Gemini to summarize selected text for you. | ||||||
| 31 | 2.4k | 46 | View → | |||
| Torii Image Translator - AI Manga Translator has a 3.6/5 rating from 73 reviews and 2.4k daily users, by stringie. Translate any image on any website in any language! Perfect for Manga, Manhwa, Manhua, Comics, Memes or any image at all! | ||||||
| 32 | 2.3k | 52 | View → | |||
| ChatGPTBox has a 4.4/5 rating from 98 reviews and 2.3k daily users, by josStorer. This extension integrates ChatGPT into the browser deeply, and provides chat windows, search engines and commonly used websites integration, and selection tools. | ||||||
| 33 | 2.2k | 46 | View → | |||
| LightSession Pro for ChatGPT has a 4.2/5 rating from 23 reviews and 2.2k daily users, by Emil K. Fix slow, laggy ChatGPT tabs in Firefox. Local-only extension that speeds up long conversations by trimming old messages from the page (no data leaves your browser). | ||||||
| 34 | 2.2k | 43 | View → | |||
| ChatGPT search has a 3.8/5 rating from 20 reviews and 2.2k daily users, by ars3nb. Change default search engine to ChatGPT search. dev for firefox by ars3nb | ||||||
| 35 | 2.1k | 41 | View → | |||
| Copilot Sidebar has a 3.6/5 rating from 11 reviews and 2.1k daily users, by Yashjit. Embeds Microsoft Copilot in Firefox sidebar | ||||||
| 36 | 2k | 35 | View → | |||
| Chat GPT for Google has a 2.8/5 rating from 13 reviews and 2k daily users, by Chat GPT for Google. See the ChatGPT responses right next to your search engine results. https://extensionchatgpt.com/ See our youtube guide: https://www.youtube.com/watch?v=p9it2NCB3_c | ||||||
| 37 | 2.0k | 51 | View → | |||
| AI Anywhere for ChatGPT has a 4.6/5 rating from 38 reviews and 2.0k daily users, by Juraj Mäsiar. 📈 Press "Alt + i" or use context menu to quickly access 💬 ChatGPT, GitHub Copilot, Claude, T3 Chat, Lumo, Gemini, DeepSeek, Mistral, Perplexity and Grok. | ||||||
| 38 | 1.9k | 44 | View → | |||
| Gaugr for Claude AI (Usage Tracker) has a 4.3/5 rating from 6 reviews and 1.9k daily users, by Pilote Code. Enhance your Claude AI experience with Super Claude - usages, notifications, and more! | ||||||
| 39 | 1.7k | 34 | View → | |||
| Export ChatGPT has a 2.4/5 rating from 36 reviews and 1.7k daily users, by Mohalobaidi. Export your ChatGPT threads in the Markdown format with the'Export ChatGPT' extension. this tool is a must-have for ChatGPT users. | ||||||
| 40 | 1.7k | 38 | View → | |||
| Claude Exporter has a 3.5/5 rating from 11 reviews and 1.7k daily users, by agoramachina. Export conversations and artifacts from Claude.ai | ||||||
| 41 | 1.7k | 50 | View → | |||
| Summarize and Translate with Gemini has a 4.6/5 rating from 46 reviews and 1.7k daily users, by Sadao Hiratsuka. Summarize and translate web pages using Gemini or OpenAI-compatible APIs. | ||||||
| 42 | 1.6k | 43 | View → | |||
| Superpower ChatGPT has a 3.4/5 rating from 132 reviews and 1.6k daily users, by Saeed Ezzati. Our take: A power-user layer over ChatGPT: folders, search, bulk export, prompt history. Only worth it if you live in ChatGPT daily; casual users will not miss it. Add Folders, Search, Export, Prompts Manager, Prompt Optimizer, Minimap, Gallery, Notes, Reference Chats, Model Switcher, Pinned Messages, Public Prompt Library, Favorite Prompts, Timestamps, and many more features to ChatGPT | ||||||
| 43 | 1.6k | 47 | View → | |||
| Pinned ChatGPT has a 4.4/5 rating from 27 reviews and 1.6k daily users, by ChatGPT. Open the pinned ChatGPT tab. If none is available, a new one will be created. | ||||||
| 44 | 1.6k | 40 | View → | |||
| Youtube ChatGPT summarization has a 3.1/5 rating from 83 reviews and 1.6k daily users, by ai fan. Generates summaries for youtube videos using ChatGPT | ||||||
| 45 | 1.6k | 46 | View → | |||
| ChatGPT Ctrl+Enter Sender has a 4.5/5 rating from 13 reviews and 1.6k daily users, by masachika.kmd. Use 'Ctrl+Enter' for sending messages in ChatGPT. Prevents accidental sends and allows line breaks with Enter. | ||||||
| 46 | 1.6k | 46 | View → | |||
| Ai Chat everywhere has a 4.1/5 rating from 61 reviews and 1.6k daily users, by khashayar. Faster access to the best and free Ai Chats everywhere on all websites. support OpenAI ChatGPT, Google Gemini, Claude, Grok, NotebookLM and Ai agents and ... . | ||||||
| 47 | 1.6k | 47 | View → | |||
| ChatGPT Bulk Delete has a 4.8/5 rating from 11 reviews and 1.6k daily users, by User_425. An extension to bulk delete ChatGPT conversations | ||||||
| 48 | 1.6k | 47 | View → | |||
| Google Reader: Free Natural AI Text to Speech, TTS has a 4.7/5 rating from 15 reviews and 1.6k daily users, by Democratic Developer. Natural Gemini AI text to speech (TTS) for the web, PDFs, articles, and docs. Download or read aloud using high-quality AI voices - a free alternative to ElevenLabs and Speechify with high-quality TTS! | ||||||
| 49 | 1.5k | 49 | View → | |||
| ChatGPT in Sidebar has a 5.0/5 rating from 16 reviews and 1.5k daily users, by All In AI. ChatGPT in the sidebar: Ask any question about the page you visit. | ||||||
| 50 | 1.5k | 43 | View → | |||
| Bing AI for Firefox has a 3.8/5 rating from 41 reviews and 1.5k daily users, by Patrik Martinko. This add-on removes the limits of Microsoft Copilot / Bing AI (ChatGPT v4) for Mozilla Firefox by setting appropriate features for the browser. | ||||||
| 51 | 1.4k | 44 | View → | |||
| AI answer in Google has a 4.0/5 rating from 53 reviews and 1.4k daily users, by OptiSearch. Puts AI answer next to Google results | ||||||
| 52 | 1.4k | 37 | View → | |||
| Wordtune: AI Writing, Paraphrasing & Grammar Tool has a 3.4/5 rating from 14 reviews and 1.4k daily users, by AI21. With Wordtune, your AI writing companion, you can easily paraphrase, rewrite, correct grammar and more - all for free. In just a few clicks, you can turn your scattered thoughts into exactly what you want to say and streamline your writing process. | ||||||
| 53 | 1.4k | 46 | View → | |||
| Browser Control MCP has a 5.0/5 rating from 6 reviews and 1.4k daily users, by EyalZ. Provides AI assistants with safe access to tab management, browsing history and webpage text content via a local MCP (Model Context Protocol) connection. | ||||||
| 54 | 1.3k | 45 | View → | |||
| Janitor AI Scraper has a 4.4/5 rating from 22 reviews and 1.3k daily users, by Weary Galaxy. This extension can scrape characters from Janitor AI. You can download them as PNG in Character V2 Specs to import into SillyTavern or other compatible apps. | ||||||
| 55 | 1.3k | 41 | View → | |||
| Dual Subtitles & AI Translation - InterSub has a 3.9/5 rating from 20 reviews and 1.3k daily users, by InterSub. Language learning with dual subtitle translator dualsub to immersive translate meaning of words: Spanish to English, to Japanese etc | ||||||
| 56 | 1.2k | 35 | View → | |||
| Youtube Transcript AI Summary has a 3.0/5 rating from 24 reviews and 1.2k daily users, by RSpark. Get AI generated summary for Youtube video transcript. | ||||||
| 57 | 1.2k | 5 | View → | |||
| ClaudeCodeBrowser has a 0.0/5 rating from 0 reviews and 1.2k daily users, by nanogenomic. ClaudeCodeBrowser enables AI-powered browser automation through the Claude Code CLI. It allows Claude to interact with web pages by taking screenshots, clicking elements, typing text, scrolling, and navigating - all controlled via a local MCP server. | ||||||
| 58 | 1.1k | 45 | View → | |||
| AI Detector for text and images - Winston AI has a 4.3/5 rating from 33 reviews and 1.1k daily users, by Winston AI. Winston AI is the most trusted AI detector to help identify AI generated content and images. | ||||||
| 59 | 1k | 34 | View → | |||
| AI Chat WEB3.0 - ChatGPT 4.1 has a 3.3/5 rating from 12 reviews and 1k daily users, by AI Chat WEB3.0. WEB3.0 AI Chat with GPT-4.1 Turbo. Private and anonymous chat, 40+ specialized agents, unlimited messages. SearchGPT integration. Complete privacy protection. Based on ChatGPT GPT-4.1 API | ||||||
| 60 | 1k | 40 | View → | |||
| Gemini next to Google results has a 3.9/5 rating from 36 reviews and 1k daily users, by OptiSearch. 🗨️ Gemini answer alongside Google results. | ||||||
| 61 | 968 | 32 | View → | |||
| AI Prompt Genius has a 3.0/5 rating from 20 reviews and 968 daily users, by bennyfi4. Discover, share, import, and use the best prompts for ChatGPT & save your chat history locally (formerly ChatGPT History) | ||||||
| 62 | 921 | 45 | View → | |||
| AI Code Finder & Alerts for Papers: CatalyzeX has a 4.8/5 rating from 20 reviews and 921 daily users, by CatalyzeX. 🧑💻 Get implementation code for research papers directly on Google Search, ArXiv, Scholar, Twitter, Github, PubMed, IEEE, and more | ||||||
| 63 | 906 | 43 | View → | |||
| Claude Counter has a 5.0/5 rating from 4 reviews and 906 daily users, by pauljones0. Real-time token counter, cache timer, and full-precision usage bars for claude.ai - right in the composer. Know your limits before you hit them. | ||||||
| 64 | 904 | 43 | View → | |||
| Duck.ai Chat on Sidebar has a 4.9/5 rating from 8 reviews and 904 daily users, by Koala Yeung. (Unofficial) Fast and anonymous, DuckDuckGo's privacy-first AI Chats now available on your sidebar for free. Supports OpenAI ChatGPT, Claude, Llama and Mixtral. Respects your privacy. Free of charge. No need to register or login. | ||||||
| 65 | 902 | 31 | View → | |||
| Mapify - AI Mind Map and Youtube Summary has a 3.5/5 rating from 2 reviews and 902 daily users, by XMIND LIMITED. Summarize anything to mindmap with AI | ||||||
| 66 | 870 | 44 | View → | |||
| RTL All Fixer (Right To Left Fixer) has a 5.0/5 rating from 7 reviews and 870 daily users, by Dr.FATAL. Fixes right-to-left text direction issues and manages RTL sites To fix the problem of displaying Farsi and Arabic texts while chatting or working with artificial intelligence such as Chatgpt Poe DeepSeek Grok ... برای رفع مشکل نمایش متن فارسی عربی | ||||||
| 67 | 845 | 44 | View → | |||
| Clarify AI: YouTube Summaries has a 4.3/5 rating from 90 reviews and 845 daily users, by Clarify AI. Summarize YouTube videos with AI, timestamps, transcripts, bookmarks, and chat. | ||||||
| 68 | 797 | 38 | View → | |||
| Tailwind - AI marketing content assistant has a 3.9/5 rating from 16 reviews and 797 daily users, by Tailwind. Tailwind: AI makes generating copy with AI and scheduling content to Pinterest and Instagram so easy it’s practically a superpower. | ||||||
| 69 | 768 | 41 | View → | |||
| NotebookLM Tools for Gemini Notebook™ has a 5.0/5 rating from 2 reviews and 768 daily users, by trungpv. Power tools for NotebookLM (Gemini Notebook): bulk import, folders, custom prompts, duplicate cleanup, studio, tags & dark mode. | ||||||
| 70 | 757 | 26 | View → | |||
| 会译:对照式翻译&沉浸式AI翻译 has a 2.8/5 rating from 4 reviews and 757 daily users, by Nightingales Tech. 为用户提供更好用的 AI 翻译和更流畅的阅读体验 | ||||||
| 71 | 754 | 39 | View → | |||
| Save my Chatbot - AI Conversation Exporter has a 3.9/5 rating from 29 reviews and 754 daily users, by Hugo COLLIN. 🚀 Download Claude, Perplexity, Phind, ChatGPT and MaxAI-Google knowledge into markdown files! | ||||||
| 72 | 743 | 40 | View → | |||
| PLaMo翻訳 - AIブラウザ翻訳 has a 4.4/5 rating from 10 reviews and 743 daily users, by Preferred Networks (PLaMo Translate). 国産AI「PLaMo翻訳」で、Webページをレイアウトそのまま高品質に翻訳。ワンクリックで簡単に実行。無料で始められます。 | ||||||
| 73 | 738 | 31 | View → | |||
| Comic Translator - Manga translator using AI has a 3.5/5 rating from 4 reviews and 738 daily users, by liquiddev99. Translate Manga, Manhwa, Manhua, Comics on any website into any language! | ||||||
| 74 | 735 | 37 | View → | |||
| Grammar Checker and Writing Assistant by Sapling has a 3.8/5 rating from 28 reviews and 735 daily users, by Sapling.ai. AI-powered grammar checking, paraphrase, and autocomplete for email, docs, chat, and more. | ||||||
| 75 | 724 | 41 | View → | |||
| Save ChatGPT as PDF has a 4.5/5 rating from 16 reviews and 724 daily users, by AI Power. Save your ChatGPT conversation into a PDF file. | ||||||
| 76 | 721 | 43 | View → | |||
| ChatGPT Timestamp has a 5.0/5 rating from 9 reviews and 721 daily users, by Yiwei Dai. Displays timestamps for ChatGPT messages | ||||||
| 77 | 672 | 29 | View → | |||
| IdeaPi: Chat Exporter for ChatGPT, Gemini & Claude has a 3.3/5 rating from 4 reviews and 672 daily users, by IdeaPi.ai. Export ChatGPT, Gemini, Claude, and DeepSeek conversations to Markdown, or sync them to IdeaPi for workflow processing. | ||||||
| 78 | 665 | 40 | View → | |||
| TransorAI - AI Translator | Web, PDF, Images has a 4.8/5 rating from 5 reviews and 665 daily users, by Transor AI. Free AI translator for web pages, YouTube/Netflix subtitles, PDFs & images. Real-time bilingual translation tool. | ||||||
| 79 | 632 | 31 | View → | |||
| YourAIScroll - AI Chat History Exporter has a 3.3/5 rating from 13 reviews and 632 daily users, by Kareverie. Export your AI chat history from DeepSeek, Claude, Grok and more. Save conversations including ChatGPT Canvas, Claude Artifacts. | ||||||
| 80 | 630 | 31 | View → | |||
| AI Chat Exporter has a 3.5/5 rating from 6 reviews and 630 daily users, by Hamza. Export your AI chat conversations from Claude.ai, Gemini and ChatGPT to professionally formatted PDF documents with one click. Preserves code blocks, lists, and tables. | ||||||
| 81 | 608 | 38 | View → | |||
| Claude Chat Exporter has a 4.6/5 rating from 7 reviews and 608 daily users, by sylvester1979. Turn your Claude.ai conversations into reusable Markdown, JSON, or HTML files. Export chats with artifacts, thinking blocks, and attachments for documentation, team sharing, or Claude Projects. | ||||||
| 82 | 605 | 33 | View → | |||
| SayAI - Audio for ChatGPT has a 3.5/5 rating from 16 reviews and 605 daily users, by Nodetics. Adds voice recording and spoken answers to ChatGPT UI. | ||||||
| 83 | 592 | 38 | View → | |||
| editGPT has a 4.2/5 rating from 17 reviews and 592 daily users, by jiconaar. Easily proofread, edit, and track changes to your content in ChatGPT. | ||||||
| 84 | 579 | 38 | View → | |||
| AI Chat Export | Export ChatGPT, Claude and others has a 4.8/5 rating from 4 reviews and 579 daily users, by deadrat. Easily export conversations from AI chat platforms like ChatGPT, Gemini, Claude, and more to Markdown files for offline storage, sharing or to upload to another AI chat and continue. | ||||||
| 85 | 559 | 24 | View → | |||
| Madomi - Manga Translator has a 2.8/5 rating from 5 reviews and 559 daily users, by Pawaka Labs. AI-powered Chrome Extension for Translating Manga, Assist Quiz and More | ||||||
| 86 | 547 | 38 | View → | |||
| Claude Helper has a 5.0/5 rating from 2 reviews and 547 daily users, by Mert. Allows folder uploads to Claude projects and removal of all uploaded files | ||||||
| 87 | 547 | 24 | View → | |||
| ChatGPT for Gmail has a 3.0/5 rating from 2 reviews and 547 daily users, by Dolevf. Display ChatGPT response as a suggestion to complete emails | ||||||
| 88 | 545 | 26 | View → | |||
| NextAI Translator has a 2.6/5 rating from 25 reviews and 545 daily users, by yetone. NextAI Translator is a Firefox extension that uses the ChatGPT API for translation. | ||||||
| 89 | 532 | 33 | View → | |||
| Claude QoL has a 4.0/5 rating from 6 reviews and 532 daily users, by lugia19. Collection of enhancements for Claude.ai, such as Search, fork, TTS, STT | ||||||
| 90 | 528 | 28 | View → | |||
| DeniedPixels has a 3.1/5 rating from 7 reviews and 528 daily users, by DeniedPixels. Client-side AI-powered NSFW content filter | ||||||
| 91 | 518 | 37 | View → | |||
| GitMind AI - AI Summary and Mind Maps has a 5.0/5 rating from 1 reviews and 518 daily users, by GitMind. GitMind AI - Summarize YouTube videos, articles, webpages & docs into clear mind maps. | ||||||
| 92 | 508 | 21 | View → | |||
| ChatGPT File Uploader has a 2.3/5 rating from 7 reviews and 508 daily users, by Automate My Life. A Chrome extension that allows you to upload large files in chunks. | ||||||
| 93 | 507 | 26 | View → | |||
| Multi AI Sidebar has a 2.6/5 rating from 17 reviews and 507 daily users, by OinkAndStuff. Access to all AI apps like OpenAI ChatGPT, Bing AI, Microsoft Copilot, Google Gemini and more in a single Sidebar. Get the best AI. | ||||||
| 94 | 504 | 26 | View → | |||
| YouTube Summary with ChatGPT - Glarity has a 2.7/5 rating from 14 reviews and 504 daily users, by Felo株式会社. Show summary of ChatGPT in Youtube.com . Glarity - YouTube Video Summary with ChatGPT (AD-Free) This is an open source extension that shows a summary from ChatGPT next to Youtube. | ||||||
No extensions match those filters.
Best AI Firefox Extensions by Use Case
Best AI Writing & Grammar Assistants
The highest-adoption tools for grammar, paraphrasing, and tone - the most-used AI category on Firefox by a wide margin.
Best AI Chatbot Sidebars
Bring ChatGPT, Claude, Gemini, or Copilot into a sidebar so you can ask AI about the page you are on without switching tabs.
- AI Side Bar Go 4.2/5
- ChatGPT in Sidebar 4.1/5
- Copilot Sidebar 3.6/5
- Voila - AI Assistant, Copilot and AI Writer 4.2/5
- ChatGPTBox 4.4/5
- Multi AI Sidebar 2.6/5
Best AI Translators
Inline, AI-powered translation for web pages, PDFs, subtitles, and manga - side-by-side with the original text.
Best AI Summarizers (YouTube, Web, PDF)
Feed these a video, article, or PDF and get the key points back in seconds instead of reading or watching the whole thing.
Best AI Chat Exporters & Savers
Save, back up, and share your ChatGPT, Claude, and Gemini conversations as PDF, Markdown, or a synced note.
Best ChatGPT Power-User Add-ons
Extensions that upgrade the AI chat interface itself - web access, prompt libraries, folders, and speed fixes for long chats.
Best AI Extensions for Developers
Local-model UIs, code discovery, and browser automation built for people who work in the console as much as the browser.
Browse by Category
Search Tools
20 extensions · 63.0k users
AI search assistants, answer engines, and tools that add AI to your search results.
Filter the directory to Search Tools ↓Developer Tools
17 extensions · 30.7k users
AI extensions built for developers - code assistants, local model UIs, and browser automation.
Filter the directory to Developer Tools ↓Language & Translation
13 extensions · 736.5k users
AI translators and language tools that work inline on any page, PDF, or video.
Filter the directory to Language & Translation ↓Other
13 extensions · 41.6k users
AI assistants and utilities that do not fit a narrower Mozilla category.
Filter the directory to Other ↓News & Blogging
12 extensions · 22.0k users
AI writing, summarizing, and reading assistants for articles, feeds, and long-form content.
Filter the directory to News & Blogging ↓Appearance
7 extensions · 10.7k users
AI extensions that change how chat interfaces and pages look or behave.
Filter the directory to Appearance ↓Download Management
4 extensions · 6.9k users
AI chat exporters and tools that save conversations to PDF, Markdown, or Notion.
Filter the directory to Download Management ↓Privacy & Security
2 extensions · 1.4k users
AI-related extensions focused on privacy, control, and safer browsing.
Filter the directory to Privacy & Security ↓Photos, Music & Video
2 extensions · 1.2k users
AI tools for images, audio, and video - captions, summaries, and media translation.
Filter the directory to Photos, Music & Video ↓Games & Entertainment
1 extensions · 4.4k users
AI-powered creative and entertainment tools.
Filter the directory to Games & Entertainment ↓Social & Communication
1 extensions · 3.2k users
AI assistants for messaging, email, and social platforms.
Filter the directory to Social & Communication ↓Tabs
1 extensions · 1.6k users
AI extensions that manage tabs and browsing sessions.
Filter the directory to Tabs ↓Bookmarks
1 extensions · 630 users
AI tools for saving, organizing, and recalling what you read.
Filter the directory to Bookmarks ↓Are AI Firefox Extensions Free?
Nearly every extension in this directory installs at no cost from Mozilla Add-ons. Most follow a freemium model: core features are free, and heavier usage (higher limits, premium models) needs a paid plan the add-on itself sells. Use the rating filter in the directory to surface well-reviewed free picks fast.
Browse the directory ↑How We Rank These
- Every extension is pulled directly from the Mozilla Add-ons (AMO) public API - name, author, rating, review count, daily active users, and category. The dataset rebuilds automatically every week.
- The Quality Score is a transparent 0-100 composite: 45% adoption (daily active users, log-scaled), 35% rating quality, 20% review-volume trust signal. Identical weighting to our AI Chrome extensions leaderboard, so the two are directly comparable.
- No extension pays for placement or a higher rank. Ranking is entirely formula-driven from public AMO metrics.
- Inclusion is AI-first: an addon is listed only if it is a genuine AI tool (an AI term in its name, or a specific AI product like ChatGPT/Claude/Gemini in its description). Extensions that only block or hide AI, and tools that merely mention AI in passing, are excluded by hand.
- We do not compute a security score - Mozilla has no public per-addon vulnerability feed comparable to the one we use for WordPress plugins. The last-updated date shown comes straight from AMO.
The Quality Score formula
Quality Score = 45% x adoption score (log of daily active users, normalized 0-100 across the dataset) + 35% x rating score (rating out of 5, scaled to 100) + 20% x trust score (log of review count, normalized 0-100 across the dataset).
Usage trend sparklines are built from our own daily snapshots and fill in over the weeks after launch - Mozilla does not publish historical daily-user data, so early trends may appear flat.
Frequently Asked Questions
Are AI Firefox extensions safe to install?
Safety depends on the specific add-on's permissions and author, not on it being "AI." Mozilla reviews add-ons before listing them, but you should still check what an extension can access before installing (most AI assistants request permission to read and change data on the pages you visit, since that is how they work) and prefer add-ons with a large, established review base - like the ones ranked here - over unknown authors with few reviews. Look for the "Recommended" badge, which Mozilla gives to add-ons that pass extra review.
Are these AI Firefox extensions free?
Nearly all install at no cost from Mozilla Add-ons. Many use a freemium model where basic features are free and advanced usage (higher limits, premium models) needs a paid subscription - check each add-on's own listing for current pricing, since it changes independently of this directory.
How do I install an AI Firefox extension?
Open the add-on's Mozilla Add-ons link from the directory above, click "Add to Firefox," then confirm the permissions prompt. Once installed, the extension's icon appears in your toolbar - right-click it to pin or manage it. Most AI sidebar and assistant extensions add a button or a right-click menu you can use straight away.
How is the ranking calculated?
Each extension gets a 0-100 Quality Score from three public Mozilla Add-ons metrics: daily active users (45% weight), star rating (35% weight), and review count (20% weight). See the Methodology section for the exact formula - no extension can pay to improve its score or placement.
How often is this list updated?
The full dataset rebuilds automatically every week from the Mozilla Add-ons API, and we take a daily snapshot of user counts to track trends over time. The "last updated" date at the top of the page reflects the most recent rebuild.
Why are some popular Firefox add-ons not on this list?
This is an AI-only directory. Popular extensions that are not AI tools - ad blockers, password managers, screenshot tools, VPNs - are deliberately excluded, even when their store copy mentions AI in passing. Extensions whose whole purpose is to block or remove AI features are excluded too, since they answer a different question than "which AI tools should I add?"