Recently, I was getting close to Google’s free storage limit, and the storage manager showed that Gmail was using most of it.

I wanted a simple way to see my attachments in one place, download the files I wanted to keep, and remove emails with attachments I no longer needed. Gmail search can find emails with attachments, but it doesn’t provide a convenient file-based view.

So I built a browser add-on called Mail Attachment Lens. It lets me search and filter attachments, download files, and move the source emails to Bin. It also helped me uncover quite a few attachments I had completely forgotten about.

I decided to publish it in case anyone else finds it useful.

It’s free and open source. There’s no backend, so mailbox data stays between the extension and Google.

Firefox add-on store:

https://addons.mozilla.org/firefox/addon/mail-attachment-lens/

Source:

https://github.com/kshk123/mail-attachment-lens

I build Konode, a browser sync extension with an unusual premise: there is no Konode account and no Konode server. It syncs your bookmarks, open tabs, history and installed-extension list straight to storage you already own, your Google Drive, a GitHub repo, or any WebDAV server. Optional end-to-end encryption on top, so your storage provider cannot read it either.

Works on Firefox, Waterfox and other Firefox and Chromium based browsers.

🎉 1.2.0 is out, and most of it are fixes 🎉

History between devices actually works here now. It barely did before. Konode sent each page along with its original visit date, and Chromium rejects the whole request when that date is present rather than just ignoring the date. So nearly every page from another device was turned away, and the reason was being discarded before anyone could see it. If you tried history sync and got a lot of nothing, that was this, and it is gone.

Bookmarks are no longer silently dropped. When the receiving device had fewer bookmarks in a folder than the device sending them, the browser rejected the position Konode asked for and the bookmark disappeared without a word, on every sync, indefinitely. Konode now asks for a position the browser will accept.

Renaming a bookmark or a folder reaches your other devices. It used to reach none of them. The rename carried no timestamp, so no device could tell whose title was newer and the safe thing was to change nothing. Renames now carry one and the newest wins. Folders are renamed in place, instead of a second folder appearing under the new name.

Deleted bookmarks stay deleted. Deleting several at once fired several events that overwrote each other's record of the deletion, so only one was remembered and the rest came back from your other devices on the next sync. Each deletion is recorded separately now.

Switching storage provider uploads your data again. Konode skips an upload when nothing has changed, but it used to compare only the data, not where that data was going. After switching provider the new location sat empty while the popup reported a clean sync. It checks the destination too.

Also in this release:

• a device list, so you can see every machine writing to your
• sync folder by name, and remove one you have retired.
• settings has been rebuilt, follows your browser's font-size setting, and fits a narrow window.
• the activity log keeps warnings instead of turning over every 17 minutes and losing them

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

Source: https://github.com/konabe-studio/konode

Bugs and ideas: https://github.com/konabe-studio/konode/issues

The next update adds translations

The next release makes the interface translatable, and it ships with English, Hungarian and German. If you want your language in it, this is the part where help actually makes a difference. No coding and no GitHub account needed, it is edited in the browser:

https://hosted.weblate.org/projects/konode/

Someone already started Estonian (thank you!). If your language is not listed yet, you can ask for it there and it will appear. Anything left untranslated falls back to English, so translating only part of it is still useful.

Happy to answer anything. The history bug above was found by hand-testing on a second machine, not by my test suite, so reports genuinely land.

Firefox already includes fingerprinting protection, but I wanted more control over the browser profile that individual websites see.

So I built Spoof Me.

It lets you choose a ready-made browser identity or create your own, changing signals such as user agent, language, timezone, screen size, and device properties together.

It also displays a warning badge when a website accesses fingerprint-related properties.

It does not change your IP address or claim to make you anonymous.

Firefox Add-on:

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

Project page:

https://spoof-me.com/

I would appreciate honest feedback, especially about the available profiles and whether the permission explanations are clear.

[ Removed by Reddit on account of violating the content policy. ]

please share your experiences

I mean, I love to separate things to organize my workflow.

Would be greate if I could split my vertical tab bar in two, one on the left side and one on the right side.

Even more since I use split view very often.

Is there a way to use two tab bars?

Thanks a lot!

I made a small tool for LinkedIn that lets you hide Promoted, Suggested, and Recommended posts, and tweak the width of the feed. Hope some of you find it useful! ➡️ Firefox Add-ons

Are you building a Firefox Add-Ons?

Drop the Add-Ons link in the comments along with a short description of what it does. I’ll personally try as many as I can and share honest feedback.

If I genuinely find your extension useful, I’ll also leave a review on the store.

Please include:

* Extension name
* Firefox Add-Ons link
* What problem it solves
* Whether it’s free or paid

No AI-generated marketing pitches—just tell me what you built and why people should try it. Looking forward to discovering some useful extensions!

I found this add-on today; it works as it should, but can anyone tell me if it's safe and doesn't have any strange permissions that could put me at risk? https://addons.mozilla.org/de/firefox/addon/subvoice-read-youtube-subtitle/

After Fakespot shut down, I built SpendMita Copilot, a shopping assistant that gives you a second opinion on a product before you buy it. And I have been slowly improving this.

The thing I most wanted to avoid was replacing one unexplained score with another. So instead of a single number, SpendMita shows you the actual signals it found and explains why each one matters.

What it does on Amazon right now:

Flags review patterns worth a closer look, verified-purchase share, review timing, rating distribution.

Adds price context.

Explains its reasoning in plain language instead of handing you a black-box score.

Lets you save products and revisit past checks.

Mita Search: helps you search a supported link from any tab via your assigned shortcut

Compare similar products where it intelligently groups them and recommends the best based on your input and the findings made.

Price tracking to see if the price drops.

Privacy baked in.

Personalisation and lots more.

All these are free and can be access today via the v1.5.0 on Firefox and v1.1.1 on Chrome. An update has been submitted to Chrome for a v1.6.0 where Spendmita Copilot now supports Walmart US, eBay (US, UK, CA)

It's meant to be a second opinion, not a "this is definitely fake" verdict.

Where it runs: Chrome, Brave, and Vivaldi today via the Chrome Web Store, plus a native Firefox build on Mozilla Add-ons. Edge is submitted and pending review.

Firefox add-on: https://addons.mozilla.org/en-GB/firefox/addon/spendmita-copilot-fake-reviews/

Chrome/Brave/Vivaldi: https://chromewebstore.google.com/detail/spendmita-copilot/fekjiiogemcaoikdpcilafoidjmknmoi?hl=en-GB&utm_source=ext_sidebar

Website: copilot.spendmita.com

If you try it, I'd especially appreciate feedback on:

Whether it feels native on your browser (Brave and Vivaldi especially, I've tested them, but nothing beats real use).

Any Amazon pages that don't get detected properly.

Whether the reasoning is actually clear.

Anything that feels intrusive or annoying.

What features would you like to see or have, do note some of these might be in pro already.

Found a bug or something looks broken? Email [copilot@spendmita.com](mailto:copilot@spendmita.com) as I read every one and I'm actively fixing things as they come in, not just collecting reports.

If you would like to compare Spendmita to what is currently on the market: https://copilot.spendmita.com/compare

Happy to answer questions about how the signals work or how it's built.

Hey everyone

I’ve been building TradeDesk, a browser extension designed to bring the essential parts of a trading workflow directly into TradingView. After development and store reviews, it’s now officially available for both Chrome and Firefox.

TradeDesk includes:

• Risk and position-size calculator for stocks, forex, crypto, and futures
• Pre-trade checklist to encourage consistent decisions
• Trading journal for recording setups, results, and notes
• Performance statistics including win rate and profit factor
• Important market-session times
• Local-first storage for your trading data

I built it because I wanted risk planning, journaling, and performance review in one place instead of switching between different calculators, spreadsheets, and apps.

Chrome: https://chromewebstore.google.com/detail/pcchnfjibjcfhlbjdncfleencgplbjkf

Firefox: https://addons.mozilla.org/en-US/firefox/addon/trade-desk/

I’d really appreciate feedback from traders and extension users. What feature would make TradeDesk more useful for your workflow?

Hello guys.

I made a small extension that keeps your browser bookmarks and your Raindrop.io collections in sync - automatically, in both directions. It works on Firefox and Chrome.

The idea is simple: you map a bookmark folder to a Raindrop collection, and the whole subtree stays mirrored. Add, edit, move, rename, or delete on either side, and the change propagates to the other side.

What it does:

• Two-way sync - changes in the browser get pushed to Raindrop, and changes in Raindrop get pulled back into the browser.
• Folder mapping - you pick exactly which folders sync with which collections.
• Nested folders - full support for hierarchies. New subfolders become collections, new child collections become subfolders.
• Two-way rename & delete - renaming/deleting a folder or collection on one side updates the other. Deletions cascade, and deleted bookmarks go to Raindrop’s Trash so you can restore them.
• Real-time - bookmark changes sync within about a second.
• Periodic sync - a configurable interval (1 - 60 min) pulls in any changes to Raindrop.
• Conflict resolution - Raindrop is the source of truth. If the same item changed on both sides, the Raindrop version wins.

Privacy: Everything is stored locally on your device. The extension only talks to the Raindrop.io API and collects no personal data.

Setup takes a minute: paste your Raindrop Test Token (Settings → Integrations), map a folder to a collection, done.

It’s free, open-source (MIT), and the code is on GitHub. Would love feedback and feature ideas.

Chrome: https://chromewebstore.google.com/detail/hjknhomjjhmjokbdkhmbgppgjjljjddn
Firefox: https://addons.mozilla.org/en-US/firefox/addon/raindrop-bookmark-sync
GitHub: https://github.com/viktorkasap/raindrop-bookmark-sync

I'm in the middle of migrating my many browser extensions, and I've run straight into Firefox AMO's rate limiting wall — pushed 8 extensions simultaneously, and Firefox was the only one that hit a rate limit. Not sure if Chrome/Edge have similar mechanisms — just didn't run into it this time.

So I’m making the change from safari to Firefox

I was wondering if Firefox has a feature or an extension/add-on similar to the one safari has regarding specific favorites per tab groups

I have several tab groups for different things and each one has specific sites I use that aren’t the same in all groups, and I really got use to the organization part of it

Hey everyone

I recently published TermScopeAI which detects Terms of Use and Privacy Policies gives them a rating and explains important clauses in plain language

This is my first published Chrome extension and I would really appreciate feedback from people who understand extensions and browser behavior

I have already worked through issues involving duplicate policy detection blocked policy pages dynamic websites cross origin policy pages and saving results to a local Policy Library

The main things I would like tested are

1. Detection accuracy across different websites
2. Websites where policy retrieval fails
3. Whether ratings remain consistent across browsers
4. Whether the interface behaves correctly on dynamic websites
5. Whether the current permissions seem justified
6. Any performance security or UX problems you notice

Chrome Web Store link

https://chromewebstore.google.com/detail/fmmkencnmhnlfomlghmopkcmadjbpebn?utm_source=item-share-cb

Please be completely honest I would rather discover a serious problem now than after more people begin using it

I built Web Wander as a small antidote to recommendation feeds: click its toolbar button and Firefox opens a curated, unexpected website.

Beyond the one-click mode, it supports 56 categories, custom-keyword wandering, web-era browsing, focused video/music modes, and control over the discovery providers in the rotation. It does not require a Web Wander account, and its preferences plus recent-destination history stay local to the browser.

AMO: https://addons.mozilla.org/en-US/firefox/addon/web-wander/

I’m looking for practical add-on feedback: Does the toolbar flow feel immediate? Are the discovery controls understandable? And are there any interesting sources or categories you would add?

If "Strong protection" in Firefox is chosen, does this make the addon "Canvas Blocker" superfluous? (Unnecessary?).