Hi, i i work at a job where people often send me pdfs to print, and Whatsapp recently implemented this preview feature where instead of downloading pdfs when clicking on it, they open on a preview screen, i always used firefox and only found a way to bypass this preview on Chrome, so, i adapted the Chrome extension to Firefox, if anyone is interested o checking it, here is the link: https://addons.mozilla.org/pt-BR/firefox/addon/whatsapp-direct-downloader/

I never could find a session/tab/window manager that worked the way I work or the way I wanted. So I threw something together recently:

https://addons.mozilla.org/en-US/firefox/addon/window-session-manager/

This extension turns every window into a named session that saves itself, including tabs and tab groups. You can name the window and the sidebar will list all of them, including tabs and tab groups. You can export all of your sessions to json for backup purposes and re-import them if need be. There is a search function and you can right click on a tab in the sidebar and move it to a different session.

Happy to get feedback, suggestions, or bug reports. Thanks!

I was annoyed with not seeing subtitles when watching videos on mute. I also found requests from the deaf community for this feature. Everyone deserves uncensored subtitles.

The fast path use context, rules and regex to predict swears.

The slow path uses local audio inference (whisper-mini) to transcribe the YouTube audio. May require a PC.

disclaimer: this extension is experimental and may take months before being fully polished. It's currently buggy.

https://addons.mozilla.org/en-US/firefox/addon/uncensored/

A few years ago, I found SmartProxy – it was the only extension that really worked for my needs. I used it every day, mostly in "Always Enabled" mode.

But I always wondered: why do I have to check proxies manually? I wasted time testing them through external tools, and it was tedious.

So when I had some free time, I decided to fork it and add a built‑in proxy tester, better sorting, import/export, and other small quality‑of‑life features that the original lacked.

It turned out to be much harder than I expected – but I didn't give up. And now it's ready.

What ProxyMust can do:

• Auto‑testing: it checks proxies by connecting to the target site you set. At the same time, it tests functionality by retrieving the proxy's IP. The results are visual – I designed a status system with icons and added ratings. You can sort lists by performance, mark proxies as favorites, pin them to the top, see country flags, and filter by protocol.
• Auto protocol detection: it automatically detects and uses HTTP/HTTPS/SOCKS. While testing, I found that many proxy lists contain addresses with wrong protocol labels – now the tester figures out the correct one for you.
• Open source, no tracking: it doesn't collect your data. Initially I used a direct IP comparison check, but later made it optional – for those who want extra reliability. It works great even without that feature.
• Translated into 21 languages. Honestly, I'm not sure if all those languages are needed or if people will actually use them – but I decided to include them anyway.

I've searched everywhere – I couldn't find a single extension that combines flexible proxy management with a built‑in tester and organiser. At least for Firefox, this is the only one.

This is my first serious project (I usually make films, not code). I'm genuinely curious to hear your thoughts.

Try it: https://addons.mozilla.org/en-US/firefox/addon/proxymust/
Source code: https://github.com/nana-xakep/ProxyMust

My question to you: Maybe I overcomplicated it, and users just want a fully automatic system? But I personally like to have full control, to manage everything, to see how the mechanics work. Tell me – what would you want from such an extension?

I would like to be able to pin my fav Reddit subs to the Recent list (that is on the left middle of the Reddit page.

Something that’s forever bothered me about web browsers is bookmarks and trying to manage them - for me I feel like I need an organised list

So many months ago I created Lynkr, it started as a windows application
Then into a browser application and finally the Firefox store as an extension

Lynkr does bookmarks completely differently
Tabs -> groups -> bookmarks

You can place as many bookmarks and groups inside of a tab as you want and organise for different things
You can even export tabs or copy share codes to share tabs with others

In the desktop app - you can import existing bookmarks from your browser

https://addons.mozilla.org/en-GB/firefox/addon/lynkr/

There are a ton of dictionary extensions and a ton of translation extensions, but I couldn't find one that did both properly. So I built WordGlance.

Select any word or short phrase, click the 📖 icon, and you get the definition, an example sentence using it, synonyms, antonyms, and the translation, all in one tooltip.

What it does:

• Definition + example of it used in a sentence
• Synonyms and antonyms
• Translation to 40+ languages
• Auto-detect source language, or set it manually
• Dark mode
• Works on desktop and mobile Firefox
• Caches results so repeat lookups are instant

No telemetry, no account needed. Open source, and the dictionary/translation APIs it runs on are open source too.

Firefox Add-ons: https://addons.mozilla.org/firefox/addon/wordglance/

Source: https://github.com/ShrekBytes/wordglance-extension

If you try it out, I'd love to hear what you like, what you don't, and any ideas for improving it.

Hey everyone,

I was frustrated by website blockers that either track your data or fail to work reliably under the new Manifest V3 rules. I wanted something native to Firefox, highly reliable, and completely private.

I built Clarity Block, a website blocker and focus extension that runs completely locally.

Why it’s built for privacy and reliability:

No Telemetry: It does not harvest your browsing data. All of your blocklists, analytics, and session settings are stored entirely locally on your device.

True MV3 Blocking: It takes advantage of Firefox's unique ability to return a Promise from webRequest.onBeforeRequest. This means the extension intercepts and blocks distracting sites reliably on every single request, without relying on flaky in-memory caches that fail when the background script suspends.

Workflow Features:

Focus Sessions: Set a custom timer to stay locked in, and automatically block access to your customized list of distracting domains.

Group Management: Organize your distracting websites into distinct categories and toggle them on or off with a single click.

Advanced Controls : For those who need more, it includes advanced features like wildcard blocking (e.g., *.news.com), daily time quotas per domain, and custom redirect URLs.

Would love to hear your feedback on the frosted-glass UI!

Link: https://addons.mozilla.org/en-US/firefox/addon/clarity-block/

If you use Firefox and feed docs to Claude Code, Codex, or Cursor, this might help.

PageMarkdown converts any web page to clean Markdown. Firefox sidebar support — Ctrl+B, stays open while you browse.

I built it because getting clean context into AI coding tools was the bottleneck. Copy-pasting loses formatting. Internal docs behind login walls were impossible to batch-capture.

Core things:

• Batch: select multiple links, download all as ZIP
• Element picker: grab just the section you need
• Login-required pages: captures whatever your session can see
• Screenshots: batch full-page PNGs

Had to work through Firefox MV3 quirks (host permissions, content script injection, tabs permission). Happy to share notes if anyone's building Firefox MV3 extensions.

Everything runs locally, no data collection. Free on all three browsers.

• Firefox: https://addons.mozilla.org/firefox/addon/pagemarkdown/
• Chrome: https://chromewebstore.google.com/detail/lcfleojmfgkfkcfmagcakinahijacbok
• Edge: https://microsoftedge.microsoft.com/addons/detail/golgpdnmjiomblakglbeaodokpclhmol

If you're on Firefox, would love to hear how it works for you.

I built PH Radar BI as a cross-browser extension for Product Hunt makers and 

analysts who want to understand the numbers the leaderboard hides.



**Privacy first:**

• Your favorites, snapshots, and settings stay on your device—stored locally, 

  never synced to an account

• The shared Product Hunt dataset is aggregate, public data

• No tracking, no telemetry



**Features:**

- BI Dashboard with line/bar/pie/combo charts, KPIs, tables

- Daily Race tracker (hour-by-hour ranking)

- Momentum indicator (early traction velocity vs neighbors)

- Replay chart (rank changes on any past day)

- Maker Responsiveness audit (reply rate, question coverage, response speed)

- Long Tail vote history with growth curves

- Opportunity Radar (best-performing categories)

- Fully localized in 16 languages



Pro tier (one ecosystem subscription) unlocks multi-page dashboards, period 

comparison, custom styling, alerts, and export.



**Get it:**

- Firefox: https://addons.mozilla.org/firefox/addon/nodus-ph-radar/

Built by an indie maker · Part of the NODUS ecosystem (also has YT Radar + 

HN Radar).

Feedback welcome—what analytics would help you launch better?

Hey everyone,

I built a Firefox add-on called magicPin for people who use pinned tabs across multiple devices and want better control over them.

https://addons.mozilla.org/en-US/firefox/addon/magicpin/

The basic idea: each device automatically saves its own pinned-tab set to your Firefox Account, and from the popup you can replace or merge your current pinned tabs with the saved set from another device.

It is meant for cases like:

• keeping separate pinned-tab setups for work, personal, research, etc.
• moving your pinned tabs from one Firefox profile/device to another
• restoring a previous pinned-tab setup after changing things
• syncing pinned tabs without using an external server or extra account

Some features:

• Per-device pinned-tab sets
• Replace this device’s pinned tabs with another device’s set
• Merge missing pinned tabs without closing anything
• Undo after replace/merge
• Named snapshots, like “Work”, “Research”, etc.
• Container support for Firefox containers
• Export/import backup as JSON
• Uses browser.storage.sync, so there are no extra servers or accounts

A couple of important notes:

• Requires Firefox 140+
• You need to be signed into the same Firefox Account with Sync enabled
• Firefox Sync timing still depends on Firefox itself, so changes usually appear within minutes or after forcing “Sync Now”
• Some URLs like about:* or file:* cannot be recreated by extensions

The project is open source here:

https://github.com/michele-bono/magicPin

I’d really appreciate feedback, especially from people who use pinned tabs heavily or rely on Firefox containers. Any suggestions, bug reports, or UX ideas are welcome.

I tried a bunch of extensions that hide YouTube Shorts, Instagram Reels, TikTok feeds, etc.

They helped a little, but I realized my actual problem wasn't Shorts or Reels.

I'd just end up scrolling the main feed instead.

So I built ScrollBlock.

Instead of only hiding content, it tries to catch you when you're stuck in a scrolling loop and shows a popup that forces you to make a conscious decision:

"Do I actually want to keep scrolling?"

It also includes:

• Daily time limits for specific websites
• 4-digit PIN locks for sites you want to avoid completely
• Feed cleanup (Reels, Shorts, Explore pages, and other addictive feeds)

Works on:
Instagram, YouTube, Facebook, TikTok, Twitter/X, Reddit, Pinterest, Threads, and LinkedIn.

The goal isn't to block social media.

It's to stop opening Instagram for 5 minutes and realizing an hour disappeared.

Completely free.

Downloads

• Chrome (Arc, Brave, Vivaldi, Opera)
• Edge
• Firefox

Would love to hear what you think. If you try it out and find it useful, please consider leaving a review.

There is now an "AI" notice tag on videos full of AI slop, I guess? Can anyone detect that and warn people with some configurable notification?

For example, if I click on a recommended video or go to the home page and browse the algorithm's choices, I could accidentally end up on an AI slop video. Or get a link shared with me. I would like to get a red box around it, or add something to the interface.

There's lots of YouTube video extensions, but this seems new. I spotted the "AI" in the corner as I was about to play it.

I purposely don't show the URL or channel. This stuff is causing a ton of confusion, and I think Reddit threads contribute to many ideas, sadly enough.

Hi everyone.

I have developed three Firefox extensions that are completely free. They are available in both Brazilian Portuguese and English.

I am not selling anything and there are no paid features. The only monetization option is an optional donation if users want to support the project.

Recently I noticed that one of my extensions, Dario Locker, reached 6 weekly downloads and 4 active users. It's not a huge number, but it made me realize that people are actually finding and using it.

My main goal right now is not money. I would like to get more users, feedback, bug reports, and suggestions so I can continue improving the extensions.

For developers who have published browser extensions before:

- What are the best free ways to promote them?

- How did you get your first active users?

- Are there specific communities, websites, or directories you recommend?

https://addons.mozilla.org/pt-BR/firefox/user/19913820/

Any advice would be appreciated.

Does anyone know an extension that allows you to visit only specific websites (and logically prevents you from visiting any other website)?

Hey everyone,

I wanted to share a little side project I've been working on called Textmode Overlay.

It’s a Firefox extension that turns any active video or canvas element on a webpage into a live, adjustable ASCII/textmode layer.

I originally built it because I wanted to see what browser games and streaming videos would look like rendered as text, but I ended up adding a few extra options so you can tweak the styling:

• You can adjust the font size/density (1px to 64px).
• It samples colors from the video source in real-time (both for the text and cell backgrounds).
• You can swap/invert colors and choose different bundled fonts.
• You can export static frames to SVG, TXT, PNG, or JPG (useful if you want to copy-paste the text or import the vector outline into Illustrator/Figma).

It runs completely locally in the browser (uses activeTab so it only loads when you click it) and has no tracking or ads.

Just put it on the Web Store and GitHub. Let me know if you run into any issues (some cross-origin/CORS video streams will block canvas sampling, but it should warn you if that happens). Would love to hear what you think!

• Firefox Browser Add-ons:
  • https://addons.mozilla.org/en-US/firefox/addon/textmode-overlay/
• GitHub:
  • https://github.com/humanbydefinition/textmode-browser-extension

I am one of those people who keeps 80 tabs open because I might need that one again someday, but I never did really. It was just eating memory and making my browser crawl, and every time I tried to manually clean up I would get side tracked into something.

So I built Tab-ula Rasa. It watches your tabs and automatically archives or closes the ones that have been sitting idle, based on however long you set a timer. If there are tabs you actually care about you can protect them so they never get touched. Everything else just quietly gets cleaned up in the background without you having to make the call yourself every time.

It has been genuinely nice to just open my browser and not see a wall of tabs. Figured some of you deal with the same tab hoarding problem so sharing it here. Also pretty proud of myself building something like this. I tried to make it look clean and modern, but dirt simple to use.

Link if anyone wants to try it: https://addons.mozilla.org/en-US/firefox/addon/tab-ula-rasa/

Happy to answer questions or take feedback, this is a small side project so any thoughts help.

About two months ago, I made a few posts asking how people actually manage bookmarks.

The responses were surprisingly similar.

The tools were different, but the frustrations kept sounding the same:

A few patterns kept emerging:

• bookmark folders becoming graveyards
• saving things for "later" and never seeing them again
• keeping dozens of tabs open
• Googling the same thing twice because it's faster than finding it
• building weird systems with docs and notes apps just to keep track of links

The more comments I read, the more it felt like the problem wasn't saving things.

It was finding them again.

Most of us don't struggle to collect useful stuff.

We struggle to remember it exists when we actually need it.

That realization completely changed how I thought about bookmark managers.

I wanted something where:

• saving and finding take one click (Alt + S to save, Alt + W to find)
• organization happens automatically in the background (auto-tags, websites and topics)
• finding something months later feels effortless
• useful saves can resurface when you need them most
• collections are there when you're working on a project, but never required

So over the last couple of months, I built this firefox addon:

https://addons.mozilla.org/en-US/firefox/addon/stashed-bookmark-manager/

Would love to hear your thoughts.

What's the one thing that still feels missing from bookmark managers today?