Firefox Webbrowser Extensions

Essentials

Addon	Description	Sourcecode
uBlock Origin	Ad blocker	GitHub
Imagus	Show/Inline-Preview images on link-hover
Consent-O-Matic	Automatically declines data use request dialogs	GitHub

Website	Addon	Description	Sourcecode
YouTube	YouTube Playback-Speed Control	Player control for speed	GitHub
YouTube	SponsorBlock	Skip sponsor messages in videos; community-sourced data	GitHub
GitHub	Refined GitHub	Various website additions and improvements	GitHub

Optional

Addon	Description	Sourcecode
Gesturefy	Mouse-gesture shortcuts/controls	GitHub
Stylus	Inject Style rules into websites automatically; Fixup any website	GitHub

Situational

Addon	Description	Sourcecode
Tree Style Tab	Vertical tab tree for managing and grouping multiple/many tabs	GitHub
Dark Reader	Automatic dark mode; activateable via enable- or disable-list	GitHub
Markdown Viewer Webext	Formats Markdown documents	GitHub
Tab Stash	Stash tabs for later use	GitHub

Website	Addon
Twitch.tv	FrankerFaceZ
Steam	Augmented Steam
YouTube	DeArrow
YouTube	YouTube NonStop
YouTube	Youtube Audio

Subjective

Website	Addon	Description	Sources
Reddit	Reddit Old To New Redirect	Redirects old.reddit.com visits to the current Reddit website/theme	GitHub
YouTube	Return YouTube Dislike	Returns the dislikes on YouTube videos. Data is sourced from last known data + community reactions + extrapolation.	GitHub

Candidates

Website	Addon	Description	Sources
YouTube	PocketTube	Youtube Subscription Manager
*	SoundFixer	Can fix audio volume levels	GitHub
Steam	ProtonDB for Steam	Adds Linux-compatibility information	GitHub