Looking at the comments, interest in privacy and adblocking seem high. But the actual addons suggested here are often redundant or even worse, make you easier to track. Instead, take a look at the Arkenfox wiki, which is more or less the gold standard for browser privacy. Both LibreWolf and Mullvad Browser, practically the most privacy/anonymity oriented browsers out there, right behind Tor, either rely on it or stick very closely to it.
I highly recommend reading the entire wiki from the start. You dont have to do everything it says, obviously, but even if you dont do anything it will give you a better understanding of browser privacy. And lastly, do not use Chrome or any chromium based browser if you care about privacy and a free and open internet. Even if you only use a chromium based browser, you help increase googles monopoly.
And umatrix was developed by Gorhill, who also develops ublock origin, and umatrix is no longer maintained because ublock origin is simply more useful.
I was hoping to receive a comment like this, since I rarely remove an addon once I installed it cause I keep thinking there must have been some reason why I did long ago.
Oh and I have a Pihole on top of all those blockers...
But I am confused about Cookie Autodelete. I know if I don't whitelist a website then as soon as I close the tab I am no longer logged in if I go back, so it must be deleting cookies right?
Browser: Firefox, gonna name stuff i don't see mentioned yet
'Multi Account Containers' + 'Container Tabs Sidebar' + 'Switch Container' + 'Temporary Containers' + 'don't care about cookies' 'Consent-o-matic'
basically allows you to easily have multiple accounts on websites while also making sure everything stays contained to its own bubble, and anything I don't have a dedicated container for gets a temporary container that deletes the cookies after a bit in order for me to both not care about cookies and also not get any cookies. at this point mostly because I don't like accidentally having an account on a non-contained instance
ff2mpv - easily launch videos in mpv, requires a bit of setup
Image Search Options - finding the source of most drawings, spotting which anime a clip is from etc
Yomichan for quick access to locally installed dictionaries (for Japanese in this case)
Toggle Clipboard
More than I feel makes sense to post TBH. But a few important ones (for Firefox):
uBlock Origin Sidebery to get my tabs in a vertical tree; if you often have more than 10-15 tabs I really recommend this!
Bitwarden (password manager)
Checker Plus for Gmail + Checker Plus for Google Calendar, easy-access email/calendar in a small window, I very rarely actually go to gmail.com
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Tampermonkey for userscripts on Kbin
Video Speed Controller, I use numpad +/- to increase/decrease speed by 0.25x, works basically everywhere including YouTube
Confetti Snippets (adds copy button to code on Stack Overflow)
DeArrow (Crowdsourced titles and thumbnails to remove clickbait from YouTube)
Enhanced Steam
Google Docs Offline
HTTPS Everywhere (changes http links to https)
JSONVue (formats and makes json collapsible)
Lighthouse (tests website performance)
Netflix Extended
Reddit Enhancement Suite
Refined Prime Video
Resource Override (let's me replace requested web resources with local versions of those files)
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Save All Resources
ShareX
SponsorBlock
SteamDB
Tab to Window/Popup (adds keyboard shortcuts to between normal browser windows and the popup windows that don't waste space with a title bar, useful for vertically split window layouts)
uBlacklist (block sites from Google search results)
View Image (returns view image option to Google Images)