Try to clear the cache and remove cookies only from websites that cause problems.

"Clear the Cache":

• Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

• Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

• Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
• Do NOT click the Reset button on the Safe Mode start window

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

ok deleting chache and history. restart. I am able to write a comment now.

(in the meantime I become old fonts again on yt, perhaps google changed them again after 1 hour hehe).

thanks a lot.

Hi, when will be shipped firefox 39?

scheduled on 30th june. thanks.

http://postimg.org/image/z4m9jxadv/ http://postimg.org/image/7vaw5f9ar/

do you like to NOT see the version number? what think the dev?? what the purpose of this joke in FF40?