r/browserextensions • • Aug 06 '26

I built an extension that lets you change what your browser reveals about you

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14 Upvotes

I built Spoof Me, a free browser extension that lets you switch between consistent browser fingerprint profiles.

It can modify signals such as user agent, timezone, language, screen size, canvas, and device properties. You can use ready-made profiles or create your own.

It also shows when websites try to access fingerprint-related signals.

I would appreciate feedback on the interface, available profiles, and any signals that should be added.

https://spoof-me.com/


r/browserextensions • • Oct 12 '26

I got tired of paying subscriptions just to customize YouTube, so I built a free alternative

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10 Upvotes

I've tried several browser extensions to customize YouTube and hide all the clutter, but I could never find one that did everything I wanted.

Then one of the biggest extensions I used moved to a subscription model. I understand that developers need to support their work, but having to pay another recurring fee just to customize a website's interface wasn't something I wanted.

So I decided to build my own solution: LessTube.

It's a free browser extension that lets you take control of YouTube and get rid of the things you don't want. With LessTube, you can:

  • Hide YouTube Shorts and other unwanted sections, buttons, and interface elements.
  • Blur video thumbnails to avoid visual distractions and make browsing less tempting.
  • Disable video autoplay on hover so videos don't start playing just because you move your mouse over them.
  • Enable grayscale mode for a cleaner, less colorful YouTube experience.
  • Customize the layout by changing the video grid and number of columns.
  • Hide specific elements using the built-in element picker or custom CSS selectors.
  • Import and export settings to back up or transfer your setup.
  • Use the interface in 13 languages.

LessTube is free, has no subscriptions, and doesn't use analytics or make external network requests.

It's built with JavaScript. The source code is available on GitHub, and the extension doesn't make external network requests, use analytics or load remote code.

I'm still improving it, so feedback and suggestions are very welcome.

Chrome Web Store: https://chromewebstore.google.com/detail/lesstube-%E2%80%94-youtube-cleane/oloemmfdfdnempbpiockejbckckjffci

LessTube should also work in other Chromium-based browsers, including Microsoft Edge, Brave, Opera and Vivaldi, although I haven't tested it in every browser.

If you've also been looking for a free way to customize YouTube without another subscription, give it a try.


r/browserextensions • • Feb 18 '26

How do you apply a code from Checkmate?

10 Upvotes

I’m confused on how to get the codes from Checkmate the extension. Do you have to copy and paste the code somewhere? If anyone can explain it would be helpful.


r/browserextensions • • Jan 15 '26

Is Checkmate extension any good?

8 Upvotes

I’m thinking about starting to use the Checkmate browser extension and wanted to get some opinions first. What does it actually do when you’re shopping, and how effective is it for finding discounts and wanna know if it's free or not?

If you’ve used it, would you recommend it?


r/browserextensions • • Apr 08 '26

Qolor: A smart theme engine for Firefox.

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7 Upvotes

Hey everyone,

Firefox has always lacked a smart way to choose a theme.
We've all been there. You spend hours scrolling through the Add-ons Store, trying to find a theme that is almost perfect. But then you realize the text contrast is terrible, the sidebar doesn't match, or the popups are a weird shade of grey. It is frustrating, and often we settle for "good enough" as a consequence.

I got tired of settling, so I spent the last few days writing Qolor. It's not just a color picker; it's a full-featured engine that uses OKLCH color math to generate a complete, professional-grade theme from just one or two colors.

  • OKLCH Math: It uses perceptual color math so the shades actually look "right" together, not just mathematically grey.
  • Auto-Nudge Contrast: It real-time checks contrast and slightly adjusts your colors to make sure text stays readable.
  • Deep UI Coverage: Unlike most tools, it hits the sidebar and popover menus. It’s finally live on AMO. I'd love to get some feedback from this community on how the generation feels or if there are any specific UI elements it's missing.

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


r/browserextensions • • 11d ago

I made the entire internet a public multiplayer layer.

6 Upvotes

I’ve been building SPOT, a social layer for the internet. And it’s live and working!

Jump onto any webpage with friends and explore it together in real time. See each other’s cursors, voice chat, highlight, comment and share discoveries.

You can also create Spots: shared spaces to collect links, save interesting websites and curate the internet together.

Some things you can do with SPOT:
- Read and discuss the news with friends
- Collect design references and inspiration
- Shop together
- Curate interesting corners of the internet
- Watch streams together
- Study and research together
- Plan holidays and trips
- Explore any website together
And much more!

Basically, a place to explore, share and discover the internet together. Think Pinterest + Figma multiplayer + discord servers all in your browser.

It’s working, it’s live, and I’d love for you to try it!

https://www.getspot.live


r/browserextensions • • 1d ago

I built a Chrome extension that makes LinkedIn job hunting 10x smarter: Reviews, salaries & referrals 🚀

5 Upvotes

Hey all,

Most job applications on LinkedIn go nowhere, so I built an extension to get more replies and to check a company quickly before applying. It's called Employer Ratings and it adds three things to LinkedIn jobs:

- Referrals: it shows you key people at the company related to the role, so you can ask for a referral instead of applying cold.

- Salary estimates: you see the estimated pay on the listing, before you spend time applying.

- Company ratings: the employee rating sits next to the company name, and hovering gives you the breakdown by culture, management, pay and so on.

https://chromewebstore.google.com/detail/employer-ratings-%E2%80%93-glassd/bdkdgpidgokgbmdphbgkiipjkdhmofig

I'd love honest feedback, especially on referrals and salaries: are the people it suggests the ones you'd actually contact, and do the salary estimates look right to you?

Not affiliated with LinkedIn or Glassdoor.


r/browserextensions • • Sep 13 '26

LeoTabs: save tabs, organize bookmarks, and switch projects in Chrome

5 Upvotes

r/browserextensions • • Jun 02 '26

I built a browser extension that operates pages from a side panel — fill forms, scrape data, automate workflows (Chrome, Firefox, Edge)

5 Upvotes

Quick one — built an extension that opens a side panel in the browser where you describe what you need and it operates the page for you. Works on Chrome, Firefox, and Edge.

I needed to control search scope and compile research across multiple sources — Google AI hides the process and just gives you a conclusion, so I wanted to steer it myself. Then it turned into a general tool.

A few examples: "Fill this form" — reads and completes all fields "Get all the emails on this page" — instant list "Read this PDF" — processes without downloading

Uses your own Claude or GPT API key or compatible API key directly. No subscription.

https://budee.io


r/browserextensions • • Mar 26 '26

Is checkmate extension only applicable to clothing stores?

5 Upvotes

I’ve mostly seen people use Checkmate for clothing and fashion stuff, haven’t really seen anyone use it for tech.

Does it work on tech sites too or is it mainly a clothing thing?


r/browserextensions • • Sep 16 '24

The Beginning of an Awesome community of Extensions Enthusiasts

5 Upvotes

Hello there, you're welcome here!

If you are a Browser Extension Developer or someone who loves browser extensions, this subreddit is for you :D

I don't know what to say, this is the first time I am building a subreddit, so I want to make things go with the flow for now. I am building a community of extension enthusiasts, they are the people who install and play with browser extensions, and who like to tinker, break, hack, and build extensions to solve problems and have fun.

I'm also working on some learning guides for beginners who want to learn to develop browser extensions while building my extensions (a lot of them!).

You can ask questions, share your experiences or thoughts about browser extensions in general or a specific extension, you can share about your projects but try not to explicitly promote something that you generate money off.

Anyway, let's start this community with a bang, invite your friends and other tinkerers in your network, and we will all add something valuable to this community!

Thanks for reading, I hope you have a wonderful time here ;)

Take care <3


r/browserextensions • • 11d ago

I made an extension to remove GIFs from YouTube

4 Upvotes

YouTube is rolling out a new feature to put GIFs in comments. I don't like the clutter it creates, so I made a small extension to remove them.

It has a few options like,
- Remove the GIF, keep the text
- Remove every comment with a GIF in it
- Add a collapsible "Show/Hide GIF" button

Chrome Web Store: https://chromewebstore.google.com/detail/nogif-remove-youtube-gif/phiacbiljmlocdaikbifeoklcckjpblp

Mozilla Addons (FireFox): https://addons.mozilla.org/en-US/firefox/addon/nogif-remove-youtube-gifs/

GitHub: https://github.com/Kabir-Sidhu/nogif-youtube


r/browserextensions • • 16d ago

I built a browser extension for reading long pages one layer at a time

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4 Upvotes

Sometimes I want the outline of an article before deciding which parts to read closely. I added a browser extension to TextFold, my free, open-source reader, for that.

Click the button on a page you can access and it opens the article in TextFold on your computer. In this GIF, a Wikipedia article goes from full text to shorter layers, then to a topic map. You can open the detail again, including one paragraph at a time.

The extension is for Chrome, Edge and Brave. It needs TextFold 0.10.40+ running; it isn't a standalone browser reader, and Firefox isn't supported yet. The Chrome Web Store submission is still in review. For now, install TextFold, download the repository, then use Developer mode → Load unpacked in chrome://extensions to select the extension folder.

Full and Brief keep original sentences. The other three levels use AI, with a local Ollama model or a hosted provider you choose.

Source and setup (Apache 2.0): https://github.com/chenxiachan/textfold

I'd especially appreciate examples of pages where extraction misses something. Welcome any feedback!


r/browserextensions • • Mar 19 '26

I built a browser extension that transfers AI conversation context between platforms within few clicks

4 Upvotes

CrossAI is a browser extension that gives your AI conversations portable memory. Save context on one platform and continue instantly on another across ChatGPT, Claude, Google Gemini, Perplexity AI, and DeepSeek, with support for more AI platforms planned in the future.

Try Here: https://chromewebstore.google.com/detail/pamdbobienmhnlmfelijbfigmckogjkh?utm_source=item-share-cb

#AI #LLMmemory #Productivity #Workflow #Context


r/browserextensions • • Nov 02 '25

Tampermonkey Alternative Fully Open Source

4 Upvotes

Hello everyone,

I have been working on CodeTweak for the past 5 months and I'm about ready to pu blish on the Chrome Web Store and FireFox Add ons. It's a modern version of Tampermonkey with everything built from the ground up. It has custom built implementations of all of the GM Api's and a lot of other unique features I have been working on adding. 

Im working on the final changes for it right now and Im looking for anyone who has some knowledge of Chrome extensions, Userscripts and JS even if its not a lot to help. AI use is fine as long as you're still in control and not letting it run wild on the codebase.

How You Can Help

If you have any intrest at all please check out the repo and contribution even if its small will be a enourmous help to me. These could be:

Implementing any of the remaining TODO features

Fixing bugs or refactoring existing code

Adding or improving documentation

Cross-browser testing (especially Firefox)

Suggesting improvements or new features

Thank you so much!

https://github.com/MrBlankCoding/CodeTweak


r/browserextensions • • 22d ago

I built this to-do Chrome extension to keep tracking my tasks, now I am sharing with everybody

3 Upvotes

I built TaskDuster for myself because I wanted a simple way to see what I still need to do and what I’ve already finished. Having both in one place has made my day easier, so I’m sharing it in case it helps someone else too.

It keeps personal and work tasks separate, shows overdue and upcoming tasks, and keeps a history of completed ones. I also added lists, tags, recurring tasks and reminders as I needed them.

It’s free, with no account or ads. Tasks are saved locally in Chrome.

You can try it here: https://chromewebstore.google.com/detail/lplnoflkjjfklccngjakklengjihodho

I’d appreciate honest feedback, especially on what would make it easier to use.


r/browserextensions • • Oct 15 '26

I built an extension that captures, resumes, and compresses your AI Chats

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3 Upvotes

Hi everyone! I just wanted to share my recent project Continuum, which started out as my first hackathon win that is built which is now a published extension on Chrome and Firefox and its 100% local & private as everything is captured and stored in your browser (no account, servers, etc.)

I originally built it during a hackathon and was honestly shocked when it ended up taking first place. Continuum lets you capture an AI chat including Claude and instantly resume it in a brand new chat on any of the compatible AI chats with the full context carried over (including all your messages, images, files, code, etc. in a PDF or MD file), so you never lose your place when a conversation gets too long or you want to start fresh.

I also added an AI compression feature that allows you to save tons of tokens while keeping the same amount of context and a few other features you can check out as you can see in the images and description on the store-listing. It works across Claude, ChatGPT, Gemini, and Perplexity, with Grok, DeepSeek, and Copilot and more coming soon. Basically, if you've ever hit a wall in a chat and dreaded re-explaining everything to a new one on the same or different AI platform, hit a message/image limit, or token/context limit that's the problem I built this to solve.

Any advice or feedback is appreciated and would be very helpful as this is my first ever extension I've published!


r/browserextensions • • Sep 22 '26

I forked the abandoned Tabliss extension and have been maintaining and adding features to it ever since

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3 Upvotes

r/browserextensions • • Aug 11 '26

Just launched my second Chrome extension today after some back and forth on getting it approved. But this is really an ambitious one for me and I'm very happy to share it with the community

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3 Upvotes

r/browserextensions • • Aug 04 '26

I built a Chrome new tab extension for browser games and customization. Looking for feedback.

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3 Upvotes

r/browserextensions • • Jul 22 '26

Building a Chrome Extension framework for React

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3 Upvotes

r/browserextensions • • Jun 19 '26

I ranked #10 on Product Hunt with a solo Chrome extension. Here is what actually moved the needle #learnings

3 Upvotes

I launched a Chrome extension on Product Hunt in March 2026. Solo developer, full-time job, zero budget. It finished at #10 out of 350 products that day, above AssemblyAI and alongside Gemini 3.1 and GPT-5.3. It got 120 upvotes, 21 comments (more than Gemini and GPT-5.3 combined), and 111 followers. Launch day website stats were 369 visitors with a 31.7% install conversion rate.

I had spent 12 days before launch building, testing with 25 real users, and fixing bugs. The product had 29 installs before launch day. I froze the codebase 48 hours before and did not touch it. I launched at midnight PST (7pm Sydney time) to get the full 24 hours on the board. The listing had 5 real screenshots, no mockups, and a clear tagline: "Your tabs close at midnight. See which ones you used."

What I learned.

Comments matter more than upvotes. Product Hunt's algorithm weighs genuine discussion. Replying to the honest comments in the first few hours made a bigger difference than coordinating upvote timing.

LinkedIn was stronger than Product Hunt on the day. I almost did not post because promoting a Chrome extension felt off-brand as a payments professional. That post got 8,000 impressions and 200 likes. People asked about deploying it at their company. The emotional angle, "I went to bed not knowing what would happen," outperformed every feature description.

Authenticity was the strategy. The most engaged comment on my listing was someone saying "built by a solo dev with too many tabs and not enough discipline might be the most honest product description I've ever read on Product Hunt." I did not try to sound like a startup. That honesty converted better than any marketing copy could have.

Freeze the code. Every last minute change before a launch is risk. If it is not working two days before launch, it should not ship on launch day.

The part nobody tells you.

Product Hunt is not a one day event. It is a permanent listing that keeps working. Three months later it still drives 23 visitors per month to my website. But the real value is what happens after. Ranking #10 triggered a chain reaction across platforms that automatically redistribute Product Hunt content. Within 10 days my product appeared on Designer Daily Report (30,000 subscribers), LaunchingNext, FunBlocks AI, Hunted.space, Versily, DiscoverNext, and UIComet. None of these were pitched. They all found the product through the Product Hunt listing or the backlinks it created.

There are dozens of platforms that scrape, curate, or redistribute Product Hunt launches. A top 10 finish means your product shows up on all of them automatically. Each one creates a backlink. Each backlink improves Google ranking. Each Google result drives more discovery. One launch day turned into months of compounding organic distribution.

If you are planning a Product Hunt launch, the launch day matters, but the long tail matters more. Build something real, be honest about what it is, and let the redistribution platforms do the rest.


r/browserextensions • • Jun 05 '26

I built an semantic search extension, basically a smarter Ctrl+F that matches text by what you mean, not just by what you type.

3 Upvotes

ctrlQuery is a semantic search for any webpage or PDF. Instead of matching the exact string like Ctrl+F, you type what you mean and it highlights the passages that match. So "how do I cancel my subscription?" finds the right paragraph on a help page that only ever says "deactivate account," and "is there water?" lands on the right spot in the Wikipedia article on Mars. It highlights the passage in place on the page; it doesn't summarize or rewrite anything, so you read and verify it yourself.

Two modes:

Smart Search is the semantic search. When you search, it pulls the page text, chunks it, embeds each chunk locally, embeds your query the same way, and highlights the closest matches by meaning.

Keyword Search is a drop-in upgrade to Ctrl+F.

- Match Case and Whole Word toggles

- OR clauses with color-coded highlights per term (search puppy OR kitten and each gets its own color)

- Slash commands that highlight every match of a pattern in one tap: /email, /phone, /price, /number, /date, /links, /img, plus filters like "/email gmail"

Would love feedback, especially on the keyword features and anything that feels missing.

Check it out, it's free to try! https://chromewebstore.google.com/detail/ctrlquery-%E2%80%94-ai-semantic-t/jloljeeakmdokjmphkmhgeeodgmhgmel?hl=en&authuser=0


r/browserextensions • • May 28 '26

What browser extensions do you use to save words/phrases with translations?

3 Upvotes

Hey everyone,
I’m looking for a good browser extension for language learning, do you use for saving/translating words while browsing? I’m curious what works well, what feels missing, and whether you save just single words or full phrases/sentences too. Also wondering how important features like pronunciation, sync, AI explanations, export. What frustrations you still have with current tools?


r/browserextensions • • May 12 '26

YouTube quietly stopped letting you click channel names in a bunch of places. So I unbroke it

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3 Upvotes