Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of Ask Lumo.ai

Ask Lumo.ai by Monessem

Ask Lumo ai let you highlight any text on a webpage and open lumo.proton.me to explain, translate, summarize, rewrite, analyze, or research it, with 70+ ready actions, custom prompts, keyboard shortcuts, and a privacy-first design.

0 (0 reviews)0 (0 reviews)
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
About this extension
Lumo ai is a Firefox extension that lets you invoke Lumo on any selected webpage text, explain, translate, summarize, rewrite, analyze, research, debug code, and more.

★ KEY FEATURES

• Floating button, appears next to selected text; click it to open the action menu
• Context menu, right-click any selection to access all actions organized by category
• Toolbar popup, click the toolbar icon to browse categories and run actions
• 70+ built-in actions across 12 categories:
💭 Common Questions (TL;DR, ELI5, fact-check, debate)
🗂 Quick Summary (one-sentence, key points, action items, decision matrix)
🌍 Translate (12 languages with country flags)
📄 Grammar Helper (correct, lengthen, shorten, formalize, rewrite)
🔍 Critical Thinking (assumptions, counterarguments, fallacies)
🖥 Code Helper (debug, improve, optimize, explain, convert)
🎓 Learning Helper (quiz, flashcards, teach back, exercises)
💼 Work & Productivity (email reply, meeting notes, action plan)
🥘 Chef Helper (recipes, substitutes, nutrition, cooking)
🔬 Research Helper (sources, analysis, deep dive, opposing views)
🎯 SEO & Marketing (keywords, meta description, social posts, ad copy)
🔒 Security Analysis (phishing check, privacy audit, vulnerability scan)
• Custom prompts, add your own prompts in Settings → My Prompts
• Page actions, send or summarize an entire page without selecting text
• Keyboard shortcuts, Ctrl+Shift+D opens the assistant with the current selection
• RTL support, force right-to-left text direction for Arabic, Persian, Hebrew, and Urdu responses
• Dark/Light theme, matches your system or manual preference
• Backup & Restore, export/import all settings and prompts as JSON
• Response language, choose the language for Lumo's responses
• Reuses existing Lumo tab, no duplicate tabs

★ HOW IT WORKS

The extension opens Lumo's public website (https://lumo.proton.me/) and fills the chat input with your prompt, exactly as if you typed it yourself. It does not call any private API, use credentials, or bypass Lumo's terms.

You pick the AI model inside Lumo itself, no model list to maintain in the extension.

★ PRIVACY

Your selected webpage text is sent only to Lumo. No telemetry, no analytics, no third parties. History stays on your device and is off by default.

★ DISCLAIMER

Not affiliated with Proton. This is an independent, open-source extension. "Lumo" and "Proton" and their logo are trademarks of Proton AG, used here only to describe what the extension interoperates with.

AI can make mistakes and answers may be inaccurate, please double-check the answer. Do not send sensitive, confidential, or personal information.

★ LINKS

Source code: https://github.com/Monessem/Ask-Lumo.ai
Support: https://buymeacoffee.com/monessem
Developer comments
https://github.com/Monessem/Ask-Lumo.ai
Rated 0 by 0 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
0
4
0
3
0
2
0
1
0
No reviews yet
Permissions and data

Required permissions:

  • Input data to the clipboard
  • Download files and read and modify the browser’s download history
  • Display notifications to you
  • Access browser tabs
  • Access your data for all websites

Optional permissions:

  • Access your data for lumo.proton.me

Data collection:

  • The developer says this extension doesn't require data collection.
Learn more
More information
Add-on Links
  • Homepage
  • Support site
  • Copy add-on ID
Version
5.8.1
Size
175.19 KB
Last updated
3 days ago (Sep 10, 2026)
Related Categories
  • Feeds, News & Blogging
  • Privacy & Security
  • Search Tools
License
MIT License
Version History
  • See all versions
Tags
  • chat
  • google
  • image search
  • privacy
  • search
  • security
  • shopping
  • social media
  • translate
  • vpn
Add to collection
Report this add-on
Go to Mozilla's homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Download

  • Download Firefox
  • Windows
  • macOS
  • iOS
  • Android
  • Linux
  • All

Latest Builds

  • Nightly
  • Beta

Firefox for Business

  • Enterprise

Community

  • Connect
  • Contribute
  • Developer

Follow

  • Instagram
  • YouTube
  • TikTok
  • Bluesky
  • Podcast
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.