If someone wonders why old Firefox users, while still preferring new Firefox to anything else, is still annoyed then this might be a perfect example to explain

If someone wonders why old Firefox users, while still preferring new Firefox to anything else, is still annoyed then this might be a perfect example to explain it: There used to be a number of extensions of this type on old Firefox. I cannot remember exactly this one, but here are a couple to prove what was possible [1]: - the original Firebug which became developer tools and was cloned to every other browser was just another Firefox extension(!) - an extension I used a lot was Scrapbook, which let me crawl and store websites (I used it for symfony docs back in 2007-2009 before mobile broadband was available or at least not within reach for me. It would download pages recursively according to simple, useful rules like maxrecursion, only subdirectories and only a certain domain and then rewrite every url on the page to be relative instead of absolute. You could also edit the pages locally.) - Alerts (or something similar) would check web pages according to simple rules I set up and notify me if it saw significant changes. [1]: somebody will probably tell that it existed too and was even better, I just didn't know of it.