With the number of people concerned about privacy, it is a wonder why chrome is even popular.
There was one extension I used in Chrome that I haven’t found a Firefox replacement for, but I stopped trying to look a while ago and just live without it.
Was a specific kind of cookie manager: you could whitelist a set of websites to keep their cookies. Everything else would be deleted when you told the extension to do so.
Too many websites need cookies that stick around indefinitely. But I also don’t want to delete everything everytime I close Firefox, because I may want to keep a website around for a few days without wanting to bother adding it to a whitelist.
I want something more complex than a basic whitelist and blacklist. I already use that in Firefox and it helps somewhat but not wholly. I want to manage specifically when it happens and in accordance to said lists. I haven’t found anything that handles that in the settings.
Most Chrome extensions can easily be run in Firefox. Simply download the CRX and upload an copy to addons.mozilla.org as an unlisted extension and within a few hours the extension should be approved and ready to install in Firefox.
Firefox has strong support for the extension cookie management APIs: https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/cookies
I think this might be what you are searching for. I’ve used it a few times and it does everything it promises imho: https://addons.mozilla.org/en-US/firefox/addon/cookie-autodelete