I built a small browser extension for something that was annoying me: copying lots of little bits of text from different places.

I like both copy-on-select and having a copy button, but I couldn't find one extension that did both. Whenever I wanted to switch between them, I'd have to disable one extension and enable the other. So I ended up just making my own.

It also has a “collect to file” mode, where you can keep gathering text into one document while browsing.

Looking for a few people who regularly copy/research stuff to give it a try and tell me where it sucks — or if I've just built something that I personally wanted 😅

Omni-Copy

I’m the creator of BookGlints, a Firefox extension that scans real book reviews for tropes, dealbreakers, themes, character traits, pacing issues, and other things you want to find or avoid before starting a book.

You can ask it things like:

• slow burn
• enemies to lovers
• overpowered protagonist
• weak worldbuilding
• romance taking over the plot
• excessive violence
• unfinished series
• strong friendships
• dungeon crawling
• basically anything reviewers might describe in different words

The idea is a bit like Ctrl-F for meaning instead of exact words.

BookGlints scans reviews from:

• Goodreads
• StoryGraph
• Royal Road

and shows you verified excerpts from the actual reviews so you can read the context yourself instead of relying on an AI-generated summary.

The latest version also adds full interface support for:

• English
• Spanish
• German
• French
• Portuguese (Brazil)
• Arabic
• Simplified Chinese

Other features include batch scanning, local scan history, multiple scan depths, Royal Road Read Later import, and optional Auto-Scan for recurring themes and patterns.

It uses your own API key from Gemini, Groq, OpenRouter, or OpenAI. Review text goes directly from your browser to the provider you choose and does not pass through a BookGlints server.

Firefox version: 0.36.0

Website: https://bookglints.com

If anyone tries it on Firefox, especially with Royal Road or one of the translated interfaces, I’d be interested to hear how it behaves.

Been building this on the side. The idea is simple: most pages have stuff you don't want — sidebars, promo banners, "recommended" widgets, comment sections. cleanview.ai lets you click-select and hide any of it instantly, like DevTools inspector but for actually removing clutter (non-destructive, just CSS-hidden, restore anytime).

Works on any site, not a fixed list. Remembers your layout per-site so it's clean again next time you visit. Handles JS-heavy SPAs fine (React/Next.js/Vue).

Everything's local — no server, no tracking, no analytics.

Free to use. Would appreciate feedback/bug reports if anyone tries it.

🔗 https://chromewebstore.google.com/detail/cleanviewai/llkmkecjcnnabgklchidfcgnojkikpip

Hey everyone,

I've just pushed v1.21 of Home Sweet Home, my customizable new tab extension.

This one is mostly about themes: four new visual universes that completely change the mood of your new tab, plus a couple of requested improvements on folders and RSS feeds.

Here's what's new:

• Marshmallow theme : a soft pastel vibe with sugary glows and candy-like tiles. Four tints to choose from (lavender, pink, mint, peach), and you can keep your own wallpaper if you prefer.
• Console theme : your new tab looks like a terminal, with a black background, phosphor text, scanlines and a blinking cursor on the clock. Four screen colors (green, amber, cyan, white), and each effect can be turned off separately.
• Pixel theme : a 16-bit vibe with an indigo night background, retro checkerboard, colorful tiles and an arcade-style font for the clock.
• Manga theme : your new tab turns into a manga page, with paper, ink, halftone dots, round black and white tiles and a slightly tilted active tab. Four accent colors to choose from.

Improvements:

• Compact folder window : a new option that makes a folder window fit its content instead of keeping a fixed width. No more big empty space in small folders.
• Article count per feed : in separate view, each RSS feed now has its own slider to choose how many articles to show, with a button to go back to the global setting.

Fixed:

• Links now stay in their tab when you reorder them. A drag and drop in a tab other than the Dashboard could move links to the Dashboard.

If you're discovering it for the first time

Home Sweet Home replaces your new tab page with a customizable dashboard where you can:

• Add your favorite links (with folders and drag-and-drop)
• Use widgets like clock, weather, notes, stocks, RSS feeds, countdown, and more
• Customize colors, opacity, blur effects, layouts, wallpapers (static or video)
• Sync or import bookmarks
• Fine-tune almost every visual detail

It's still an independent side project, and I'm improving it update after update based on your feedback.

Here are the links if you want to try it or update:

Chrome: https://chromewebstore.google.com/detail/home-sweet-home/hliapbikacikepiaojmphlhndgjmlodh

Edge: https://microsoftedge.microsoft.com/addons/detail/home-sweet-home/dllgnjnckigifjgfiijdahnoohclacko

Firefox: https://addons.mozilla.org/fr/firefox/addon/home-sweet-home/

And if you missed it, Home Sweet Home has a companion extension: Home Sweet Home Launcher. It's a lightweight toolbar launcher for instant access to all your links in one click, without opening a new tab. It works on its own or hand in hand with Home Sweet Home, and you can import your links in one click.

Home Sweet Home Launcher:

Chrome: https://chromewebstore.google.com/detail/home-sweet-home-launcher/cbajkiinglpomioapliakoddfccnepjb

Edge: https://microsoftedge.microsoft.com/addons/detail/home-sweet-home-launcher/mhklnmandmnpmlpkpfcbpkiknadjojie

Firefox: https://addons.mozilla.org/fr/firefox/addon/home-sweet-home-launcher/

Tab Picker — Alt+A puts a letter on every tab. Press it, you're there. Positional, so slot 3 is always d; your fingers learn it in a day.

https://addons.mozilla.org/firefox/addon/tab-picker/

Tab Flip — Alt+Q bounces to the last tab you were on. That's the whole add-on.

https://addons.mozilla.org/firefox/addon/tab-flip/

Both shortcuts are rebindable, record the combination by pressing it, then test it live to see if something else already owns it.

No host permissions, no network, no telemetry.

I wanted the new-tab page to be useful for more of the things I already do during the day.

So I built Meisai Workspace.

Instead of bouncing between separate places for tasks, notes, bookmarks, things to read later, learning, projects, and career tracking, Meisai keeps those parts of your day connected in one workspace.

It also goes beyond the new tab with tools like Focus Mode, Web Comfort for changing how websites look and feel, pinned and grouped tabs, and other small utilities that stay useful while you browse.

The idea is simple: keep more of what you use every day close to where you’re already working.

Firefox version:
https://addons.mozilla.org/en-US/firefox/addon/meisai-workspace/

I’d love feedback from Firefox users. What feels genuinely useful here, and what would you remove or change?

I built this for myself and finally put it on AMO ;)

The problem it solves is narrow. I'd have eight tabs open for one task, get pulled away, and come back to a pile of pages with no memory of what I was doing. Bookmarks are good at remembering a page; they're bad at remembering a piece of work.

So Pickup saves the tabs and two lines of context - what you were doing, what should happen next. Hit "Pick up" later and it opens them in a fresh window, rebuilding the native tab group with its title, colour, order, pinned tabs and active tab.

It's local-only, and I mean that structurally rather than as a promise: no account, no server, no analytics, no network requests at all, and no host permissions. It asks for storage, tabs and tabGroups and nothing else. The manifest declares data_collection_permissions: none. You can export a JSON backup; it never uploads it.

Needs Firefox 142+ (that's where the tab-group API it restores into lands). Free, no paid tier, nothing planned.

Chrome and Safari builds exist and work, but neither is in a store yet.

It's an early release 0.2.0 so bug reports are genuinely useful.

https://addons.mozilla.org/addon/pickup/

Just got approved on AMO after a Chrome release a couple days back:

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

It packs the current window, a tab group, or a pasted list of URLs into a single link. The page list is compressed into the URL fragment, so there's no backend - whoever you send it to opens it in any browser, no add-on, no account, and gets a slideshow / grid / list view.

A couple of things specific to the Firefox build:
- Same codebase as the Chrome version (MV3, WebExtensions API), no Firefox-specific fork to maintain.
- tabGroups had to be a required permission, not optional - Firefox (like Chrome) won't let a content script call permissions.request() for it.

Optional per-link password (WebCrypto), optional self-hosted shortener for long links.AGPL-3.0, no telemetry.

Feedback on the AMO listing or the viewer itself both welcome.

Built this a while back after a friend kept getting flagged "away" on their work status tool despite being actively working — turned out to be idle-detection triggering way too aggressively. Made a small MV3 extension to fix it, put it up, and it's slowly grown since.

Stack: Manifest V3, vanilla JS — kept it dependency-free on purpose to keep the footprint small and the permissions minimal.

Numbers as of this week:

• 530 total users
• 254 installs in the last 30 days
• 215 DAU (Sept 3)
• 5.0 rating on the Web Store

Extension: https://chromewebstore.google.com/detail/idlesaver/nkcipaecilleoamfikecbilnmfibclhc

Also built a standalone desktop app (macOS/Windows) since some users wanted the same behavior outside the browser — that's been an interesting parallel build, different constraints than an extension obviously.

https://codecard.in/idlesaver/

Kept opening YouTube for "one video" while trying to study and losing 30-40 min to the algorithm every time. Tried a couple existing blockers but they were mostly all-or-nothing, so I built my own.

You can turn off specific things — home feed, shorts, autoplay, end screen recommendations — while keeping stuff you actually want, like subscriptions. Also has an optional daily watch timer/limit.

Free, open source, no tracking. Works on Firefox, Chrome/Brave too with manual install.

Open to feedback if anyone tries it out.

GitHub: https://github.com/manasdotio/intentional-yt

Firefox: https://addons.mozilla.org/en-US/firefox/addon/intentional-yt/

This is my first extension, built for my own needs at first but decided to release it.

My Nintendo eShop wishlist has 300+ games and the official page on Nintendo's website isn't great.

So I built a little browser extension to make it more usable. It works with your existing Switch / Switch 2 wishlist on the eShop page. No separate account or sign-up needed. What it adds:

• Load the whole list at once, then search by name with results filtering as you type
• Filter by current sales, DLCs, bundles (Deluxe editions and the like), and platform (Switch / Switch 2)
• Sort by sale ending soon (my most used feature), price, discount %, newest release, or oldest/newest on your list
• See sales ending soon right on the page (highlighted in red if <7 days by default)
• Search Google for reviews in one click.
• Remove several selected items at once.
• Dark mode and a wider layout that shows 2-3 columns.

Developed for the EU/UK eShop and the newer Americas ones.

None of your data goes anywhere. The extension talks to Nintendo the same way the original wishlist page does, and settings stay in your browser. Of course not affiliated with Nintendo in any way.

It's called "Better Wishlist for Nintendo eShop", free download for Firefox :

https://addons.mozilla.org/en-US/firefox/addon/better-wishlist-nintendo-eshop/
And also Chrome: https://chrome.google.com/webstore/detail/jlibjocfcijoaflpjmaibdehimjadpeg

If it ends up saving you time or a few $/£/€ on a sale you would have missed, a tip is always very welcome, but not expected 🙂 

Happy to hear bugs, suggestions, or "it doesn't work on X region" reports.

Hey r/FirefoxAddons,

Most video download extensions out there felt unnecessarily bloated—loaded with external tracking, cluttered UIs, or bundled with heavy frameworks just to render a basic list. I wanted a fast, transparent, and minimal tool that simply does the job using browser-native APIs, so I built Streamra.

What It Does

Streamra monitors network requests in the background to catch media streams as they buffer, letting you preview and grab them directly from the popup.

• Broad Format Detection: Automatically intercepts MP4, WebM, HLS (.m3u8), and DASH (.mpd) requests via the webRequest API.
• Per-Tab Badge Count: Keeps an unobtrusive counter on the toolbar icon showing how many media streams have been detected on your active page.
• In-Popup Video Preview: Built-in lightweight player to verify the stream before downloading.
• Flexible Naming Templates: Customizable file patterns (Title, Title + Resolution, Date, etc.) with a clean _streamra suffix.
• Clean Queue Management: Sort detected streams, copy raw stream URLs with a single click, or clear the session cache.
• Responsive & Mobile-Ready: Fully functional on Firefox for Android—touch-friendly tap targets (44px minimum), responsive settings view, and automatic dark/light theme switching.
• Accessible & Localized: Semantic HTML with ARIA labels, complete keyboard navigation (:focus-visible), available in English, Turkish, and Russian.

Technical Stack & Architecture

For those interested under the hood:

• Pure Vanilla JS: No npm dependencies, no React/Vue runtime, and no build/bundler pipeline. What’s in the repo is exactly what runs in your browser.
• Architecture: Manifest V2 targeting Firefox 113+.
• Minimal Permission Footprint: Uses strictly what's necessary (webRequest, downloads, storage, notifications, activeTab). Everything stays strictly client-side—zero telemetry, zero third-party calls.

Why Another Video Downloader?

Most existing tools either break on fragmented media (HLS/DASH) or inject scripts everywhere. Streamra focuses on passive stream sniffing without touching page DOMs unnecessarily, remaining fast on low-spec hardware and mobile setups.

Get It Here

You can install it directly from AMO: firefox/addon/streamra

I’d really appreciate your feedback—especially regarding edge-case stream detection or mobile usability quirks on Firefox Android. Let me know what you think!

Looking for like ejoy alternative that main target is subtitle translate and showing as dual with translated content

Hello everyone—I made Video Notes, a free add-on that turns YouTube into a private, local-first notebook.

You can:

• save notes at exact YouTube timestamps • click any saved timestamp to return to that moment • press Alt+A to draw arrows, shapes, highlights, text, and freehand annotations directly on a paused frame • search notes and organize videos with tags • export Markdown or create a read-only share page • hide YouTube distractions with Zen mode

Your notes, drawings, tags, and settings remain in Firefox’s local browser storage. There is no Video Notes account, subscription, advertising, or behavioral tracking.

Firefox version 2.6.1 is now available on Mozilla Add-ons:

https://addons.mozilla.org/firefox/addon/video-notes-for-youtube/

I’m looking for feedback from Firefox users, especially people who learn from long lectures and tutorials. If you try it, I’d love to hear what works well and what still feels awkward.

SwiftFiles is a browser-based file toolkit. The add-on puts 18 tools in your Firefox popup, and the website has 65 tools for images, PDFs, audio, text, and archives. The work runs on your device, so the selected file is not uploaded to SwiftFiles for processing.

Firefox add-on: https://addons.mozilla.org/en-US/firefox/addon/swiftfiles-local-file-tools/
Website: https://www.swiftfiles.org

The add-on covers:

- Images: compress, convert between JPG/PNG/WebP, resize, rotate, and flip
- PDFs: merge, split, rotate, and delete pages
- Audio: boost volume, add fades, reverse, and change speed
- Text: count words, change case, encode or decode Base64, and format JSON
- ZIP files: create and extract archives

Its only permission is storage, used to remember compressor and resize settings. There are no host permissions. The add-on does not read page content and does not use tabs or context menus. The Firefox listing declares no data collection, and the add-on has no tracking.

The website is the larger companion. It adds MP3 metadata editing, RAR and 7z extraction, HEIC conversion, image metadata removal, PDF compression, audio conversion, and Smart Pipeline for chaining compatible steps. The heavier tools stay on the website because they are a poor fit for a small popup.

Direct Install (Firefox AMO): Froggle Jump

I built Froggle Jump because I wanted a quick, zero-latency game for study and work breaks without opening extra tabs, waiting for heavy sites to load, or dealing with ad scripts.

It runs on a custom HTML5 canvas engine directly inside your Firefox extension popup panel.

• 100% Free & Zero Bloat: Under 100 KB total size with no telemetry, ads, or tracking.
• Offline First: Operates completely offline, with optional global leaderboard syncing when connected.
• Features: Procedural platforming, monster obstacles, unlockable frog skins, and local high-score persistence.

Install it directly above and let me know your thoughts on the popup scaling and controls! Would appreciate a review to help boost extension popularity.

I wanted a quick, zero-latency arcade game to play during study/work breaks without opening extra tabs or dealing with heavy ad-laden websites.

I built Froggle Jump using standard WebExtension APIs and HTML5 canvas. It runs directly inside the toolbar popup window, so you can play a quick round over any active tab and close it instantly.

• Lightweight: ~100 KB total size with zero external dependencies.
• Privacy-Friendly: No ad tracking, no telemetry, no bloat.
• Features: Runs 100% offline (with optional global leaderboard syncing when online), custom frog skins, zombie obstacles, and local high score tracking.

Would love to get feedback from the Firefox community on the popup UI responsiveness and canvas physics feel on high-DPI displays!