I think there was an extension named Skip Redirect that solved this issue...

I'm going to choose a VM.

What about Apple's WebKit? Does it count?

Linux Mint is supposed to come with Flatpak support by default. Running flatpak remotes shows that I have flathub configured:

Name    Options
flathub system

That said, thank you for answering! I appreciate it, even if it doesn't solve my issue.

Write. Anything you like. Nonsense, the issues of the world, a memory, a story. Sometimes, things (thoughts/memories) hurt less when written. Then you can burn the paper. Or tear it. Or do nothing with it. But burning it feels so good. It's like burning your sad thoughts.

Some websites display warnings even though everything works fine, like web.skype.com. But that's the closest thing to doesn't work I've ever seen on Firefox.

Tried it several times! Didn't fix the issue...

I don't think mintinstall lets you change where you're installing the program... Interestingly, I ran flatpak search libreoffice again and it quickly returned some packages, which it didn't do before. Still can't install anything though...

Timelinize... description from GitHub: Organize your photos & videos, chats & messages, location history, social media content, contacts, and more into a single cohesive timeline on your own computer where you can keep them alive forever.

There's also Delta Chat, FairEmail and DEFINITELY LOCALSEND.

This is not a good method, but...

I think I'd specify an a number... let's say, 2/3 of the books get to survive, the others will be thrown away. Then I'll start seperating them into three groups; the ones I become immediately sure are great books, the ones I'm sure are trash, and ones I'm unsure about. Then I'll go random: if I chose too many books as good ones, I'll randomly take some of them out, unless I'm sure they are all great books that should stay in the library. Or start randomly adding books from the unsure pile to the ones that get to stay.

Well. Not a great method.