A collection of awesome browser extensions for GitHub.

• Codecov: Code Coverage Overlay
• Contributors on GitHub
• Follow Me or Not
• GifHub
• GitHub AST Viewer
• GitHub Awesome Autocomplete
• GitHub Categoric
• GitHub Email Extractor
• GitHub Extended
• GitHub Grouped News
• GitHub Highlight Selected
• GitHub Hovercard
• GitHub Markdown Outline Extension
• GitHub Omnibar
• Github Plus
• GitHub Pr Filter
• Github Repo Size
• Github Travis Stat
• github.expandinizr
• Gitter Helper
• Hide files on GitHub
• Isometric Contributions
• Lovely forks
• MiniGitHub
• News Feed for GitHub
• Notifier for GitHub
• npm-hub
• Octo Mate
• OctoLinker
• Octomerge
• OctoPreview
• Octotree
• Pages2Repo
• PR file filter for Github
• Refined GitHub
• Review on GitHub
• Show All GitHub Issues
• Tab Size on GitHub
• Twitter for GitHub
• Where is it?
• ZenHub

Overlay code coverage in Github and Bitbucket. Supporting commits, blobs, blame, compare, pulls and more. Free for open source repositories.

Show the # of PRs and other contributors stats in the Issues/PRs tab. Can be helpful for maintainers that want to know if it's a contributor's first PR.

Chrome extension to check if the GitHub profile you are visiting, follows you or not in a Twitter-like UI

A Chrome extension that adds a button on GitHub comment toolbars, allowing you to search for (and include) GIFs in comments.

View the abstract syntax tree (AST) of code on GitHub.

Simple and discreet extension that enhances GitHub's search, letting you search for repositories and people faster than ever.

Categorize your mixed GitHub notifications

Chrome extension to fetch the email ID of a user even if they haven't made it public on their GitHub profile

A Chrome extension to discover more repositories

Group stars, forks, and other events in your dashboard/news feed.

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Highlight selected word in GitHub source view like Sublime Text.

Neat user/repo/issue hovercard for GitHub.

Displays a clickable outline of all topic headers for markdown documents on GitHub

Omnibar for GitHub just like bitbucket's

Displays size of each file, download link and an option of copying file contents directly to clipboard

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Add ability to filter files in pull requests.

Automatically adds repository size to GitHub's repository summary.

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This extension is to display travis-ci status for repos in github. There is a visual chart which shows build status and duration changes for recent 10 times.

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Add breakpoints at 1400px, 1600px and 1800px for full GitHub experience on large screens. Also removes the truncating of file and directory names in the repository browser.

Makes it easy to see if a GitHub project has a Gitter room.

Hide dotfiles from the GitHub file browser.

Allows you to toggle between the normal GitHub contribution chart and an isometric pixel art version.

See forks with the most stars under the names of repositories.

An add-on for a quick gist of Github.

A Chrome and Firefox extension that shows notifications when something happens in your GitHub news feed.

Displays your GitHub notifications unread count. Supports GitHub Enterprise and an option to only show unread count for issues you're participating in. You can click the icon to quickly see your unread notifications.

When viewing a repository on github.com that has a package.json file, this extension will introspect the dependencies in package.json and display links and description for each dependency, just below the repo's README.

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Adds various useful features to GitHub:

1. Download any file by clicking the file icon.
2. Show tooltip of your unread notifications.
3. Show Repo size.
4. Show 'GH Page' link button if it has GitHub Pages.
5. Tab size customising between 2/4/8 whitespace.

Octo-Linker is a Browser Extension which links NPM, bower, Composer & Duo dependencies to their GitHub repository page. It also solve require() statments in a .js, .jsx, .coffee or .md file.

A missing button for automatic merge on build succeeds on Github. If you've reviewed a merge request, but the CI builds are still running, it can be annoying to have to wait for them to finish. This way, you don't have to wait for the builds to finish and remember to merge the request manually. Less waiting, more reviewing!

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Displays live previews of Markdown comments while you type. Works with Issues + Pull Requests.

Useful for developers who frequently read source in GitHub and do not want to download or checkout too many repositories.

Makes it easy to access repository info from a GitHub pages website.

This Chrome extension extends the file search of a pull request to allow for actual filtering with globs.

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Extension that simplifies the GitHub interface and adds useful features.

Review repositories on GitHub like a Pull Request. This extension adds the ability to github.com to make notes in files and add them as a compiled list to an issue.

Show both Issues and Pull Requests in the Issues tab by default. As it previously did.

Make tab indented code more readable by forcing the tab size to 4 instead of 8.

Infers or tries to find GitHub users' Twitter handles and present them to you in the GitHub interface.

Whereisit makes code navigation on GitHub easier. Look up and jump around class/method definitions with a single click.

ZenHub is the first and only project management suite that works natively within GitHub; enhancing your workflow with features built specifically for startups, fast-moving engineering teams, and the open-source community. The product is a browser extension that injects advanced functionality including real-time drag-and-drop Issue Task Boards, peer feedback via a +1 button, and support for uploading any file type directly into the GitHub interface. ZenHub makes it easy to centralize all processes into GitHub, keeping your team lean and agile.