zachowania wszystkich stron

How to remember and keep all pages? That's a big ask? You mean every page you have ever visited via Firefox, not a real possibility to get Firefox to do that. If you are thinking more in the line of just some pages, you can make each one memorable by 'bookmarking' it. You can have multiple bookmarks for the same website but then the icons will be the same and you can only identify by the site's page name. All of this will take a toll on your memory use and CPU use. Bookmarks are pretty much permanent whereas History has it's limits