Since a few days now, I think since the last Firefox update, but I can't be sure, because I've been away for a few weeks until Jan, 10th, Firefox is practically not usable any more. It takes forever to load a page (more than a minute) and most of the times doesn't even complete.
I am sure the connection works (it's a fast 1Gbit/s point-to-point fiber with the ISP) because when I use Chrome or Opera, they're flashy fast.
I also believe it can't be the profile/user, since I've also tried creating a new user in Ubuntu. Same effect: Chrome super-fast, Firefox doesn't practically work.
Then, on the same laptop (Lenovo S540) I have Win10 in dual boot, and Firefox 43.0.4 as well in it. So, the thing is that in Win it works perfectly fine, so I guess the problem comes only for the Firefox in Ubuntu.
To further rule out a connection issue (a part from trying both with wifi and eth connection), I've brought the laptop all the way to my office and tried with the connection at work. Well, exactly same thing: Chrome snappy. Firefox unusable.
Am I the only one having this issue?? It's a few days I'm looking online, but I haven't found anybody else's post anywhere about this...
I'm an almost-expert (not professional, but 10+ years of exp) user in Linux and Firefox both, but I really can't understand what's going on here... Is anybody having a hint for me about where to look at next?