Firefox
108 projects shared since May 2026 were built for Firefox.
How these numbers are counted and compared: the method.
Summary
108 projects shared since May 2026 were built for Firefox: add-ons, companions and plugins. 62 of them came in the last 12 weeks. Over the last 4 weeks, inzerosight drew the most discussion (9 comments). It encodes text into invisible characters for pasting and notifies users when invisible characters are present on a page. The kinds of projects built for it most are Browser tab managers, AI browser automation extensions and AI chat organizers and prompt libraries. 2 projects were pitched as alternatives to it.
Projects built with it
0
Share of stated stacks, last 4 weeks
–
Adjusted trend, last 4 weeks vs previous 8 weeks
too few to tell
Add-ons built for it
108
Share of stated stacks, each week
Share rather than counts, so changes in how many posts a subreddit lets through don't show up as trends.
Often used with
- Not enough data
What's built with it
- Not enough data
Latest add-ons built for Firefox
- TabMerger — Saves open browser tabs into named, color-coded groups that can be restored later with one click.“[TabMerger] I built a tab manager 5 years ago and just rebuilt it from scratch. How do you handle tabs you can't close yet?”
- Week-one lessons from launching… — Tracks time spent across gig work platforms, computes effective hourly rate including unpaid work, and keeps a dated session log for checking payouts.“Week-one lessons from launching a $5/month browser extension in a niche I actually work in”
- Kamelo — Replaces names, phone numbers and addresses with placeholders before text is sent to an AI chatbot, then restores the real details in the reply.“I pasted personal information into ChatGPT and instantly regretted it, so I built this”
- Code Specimen — Inspects page elements to show their font, colours, spacing, CSS, type scale, colour palette with contrast ratios, and images.“I kept paying to find out how websites were built, so i made a free extension that shows any sites fonts, colours and CSS”
- nobotty — Adds a colored trust dot to Reddit comments by scoring account age, karma, copy-pasted text and posting patterns.“Made a small extension that ranks Redditors by Trust”
- Browsentic — Runs a browser-based AI agent that drives web pages through an external agent CLI via a bidirectional MCP server.“I shipped a FREE, opensource any browser AI agent harness for any agent CLI”
- Hilo — Explains, simplifies, or translates selected text in a popover beside the selection using an AI model.“I made Hilo: select text, click, get an explanation next to it”
- Beautifer — Renders furnished and restyled versions of real estate listing photos directly inside the browser, next to the listing page.“My girlfriend looks at an empty room and imagines... an empty room. So I built a Chrome extension for her (works directly on real estate listings)”
- kosh — Provides a clean replacement interface for the browser's built-in bookmark manager, working directly with existing native bookmarks.“Browser Bookmarks, Done Right: Stop Building a Cemetery of Links [Open source]”
- ProtPeek — Displays protein structures inline while reading scientific papers in the browser.“Releasing a free and open-source browser extension to quickly view protein structures while reading papers.”
- HueMark — Highlights up to six search terms at once across a webpage and PDFs in the browser, with keyboard navigation between matches.“I would like to introduce HueMark - Multi-Word Search Extension”
- Keep — Saves selected browser tabs as named groups that can be reopened all at once or one tab at a time.“I created my first Chrome Extension!”
- Melaya — Runs AI agents that automate business workflows across APIs, web browsers, and Android apps from one platform.“I made Melaya - an AI agent platform that automates business workflows across browsers and mobile apps”
- Avy Tab Switcher — Shows recent browser tabs with letter hints so the user can jump to one by pressing a key, with search as a fallback.“Avy: a fast keyboard-first tab switcher for Chrome and Firefox”
- Cloakly — Adds a browser extension layer to Reddit that filters content, blurs NSFW posts, shows account context, and warns about risky comments and links.“Built an extension to power up your Reddit experience.”
Pitched as alternatives to Firefox
- Firefox’s default bookmarks… — Provides a custom Firefox new-tab bookmarks page that stores bookmarks and sections in local storage.“Firefox’s default bookmarks page didn’t work for me, so I built my own.”
- nativeShell — Browses web pages in keyboard-driven tiling panes with vim-style modal controls and link hints.“Built a vim-style tiling browser in C because I couldn't stand using Chrome anymore”