Refined Github for Firefox simplifies navigating and utilizing the Github repository. Also available for Chrome.

Refined Github for Firefox intends to enable features that should be included in Github to make using it easier by adding many small, productivity-enhancing tweaks.

Refined Github for Firefox Features:

Mark issues and pull requests as unread (They will reappear in Notifications)
Linkifies branch references in pull requests
Linkifies issue/PR references in issue/PR titles
Linkifies URLs in code
Linkifies issue references in code comments
Adds a 'Releases' tab to repos (g r hotkey)
Adds a 'Compare' tab to repos
Adds user avatars to Reactions
Adds a quick edit button to the readme
Shows current filename in the sticky pull request header
Shows user's full name in comments
Improves readability of tab indented code
Adds a 'Copy' button to the file view
Adds a shortcut to quickly delete a forked repo
Adds option to view diffs without whitespace changes (d w hotkey)
Adds links to patch and diff for each commit
Differentiates merge commits from regular commits
Adds Copy button to gist files
Adds Copy button for file paths to pull request diffs
Adds labels to comments by the original poster
Adds navigation to milestone pages
Adds a search filter for 'Everything commented by you'
Moves destructive buttons ("Close issue", "Cancel") in commenting forms away from primary button
Easier copy-pasting from diffs by making +/- signs unselectable
Shows the reactions popover on hover instead of click
Supports indenting with the tab key in text areas like the comment box (Shift-Tab for original behavior)
Automagically expands the news feed when you scroll down
Hides other users starring/forking your repos from the newsfeed
Prompts you when pressing Cancel on an inline comment in case it was a mistake
Moves the dashboard organization switcher to the right column
Adds a Trending link to the global navbar. (g t hotkey)
Removes annoying hover effect in the repo file browser
Removes the comment box toolbar
Removes tooltips
Removes the "Projects" repo tab when there are no projects
Copy canonical link to file when they hotkey is used
Uses the pull request title as commit title when merging with 'Squash and merge'
And much more!