Firefox 技術支援討論區

I'm running an old combo linux & firefox: 14.04 & 55.0.2 Lately some sites appear as white screens, some load then turn white, some say 'old version' then white screen, and a few seem to load but buttons can't be pushed. Config probs? Are the sites doing it, or has HTML outpaced the old firefox? Happens in both normal and private mode.

Oddly, I've tried to install newer firefoxes, but couldn't install. Old linux?

Has only been a minor problem until lately.

A linux reinstall is still too big a hassle for the moment.

Thank you all.

The Add-On feature no longer works. When I click on it in the about:addons address, it just gives a paragraph of what add-ons are and the rest is just a white, blank page. Has been working just fine (several years) until just a couple days ago. I found this out when I had to re-install a couple legacy apps due to a FF foul-up (tried to upgrade even though I refused). I still use FF 55.0.3 because that is the last version that the Tabs Groups will work with. This single feature is far more helpful to me than all the other features of FF combined, so you can see why I want to keep it.

How can I get Add-Ons to actually let me add on again?

So i downgraded to Firefox 55 and i like it. But i hate 1 thing, there is a green line when i watch a YouTube video on my downgraded Firefox. It is on the bottom of the screen, Somebody help me to get rid of the green line?