Ublock Origin is an obvious one, but I also can’t stand not having Foxy Gestures anymore. It adds customizable mouse gestures, so you can set it up to have easy swipes to go back a page, reload a page, close a tab, etc, and it feels wonderful and smooth to use compared to just using the traditional buttons to do everything. Honestly it’s kinda wild to me that this isn’t more popular now that people are so used to phone gestures. It’s good for the same reasons!
This won’t be possible. Best you can do is use something like waybackmachine to get a cached version of the page.
Shame, thank though I will be sure to try the wayback machine!
I find punching “cache:” before the url into google gets me the most recent comments. A lot of the time wayback will only have an archive of when the thread was created.