This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Əgər kömək lazımdırsa lütfən yeni sual verin.

Firefox has some very strange problems when visiting certain websites

  • 3 cavab
  • 2 have this problem
  • 7 views
  • Last reply by cor-el

Clint B
Clint B
more options

I just upgraded to to Mac OS Catalina and Firefox 75, and I've noticed two very strange and specific problems on certain websites.

-On Wikipedia the number 9 is displayed as an underscore _ So the year 1669 looks like 1__9, etc.

-On Blogger, in the compose mode, typing lowercase y makes nothing appear, and typing lowercase z produces quotation marks!

I tried using a different (brand new) keyboard, and the problem remained.

I tried those two websites in the Safari browser, and there were no problems.

I just upgraded to to Mac OS Catalina and Firefox 75, and I've noticed two very strange and specific problems on certain websites. -On Wikipedia the number 9 is displayed as an underscore _ So the year 1669 looks like 1__9, etc. -On Blogger, in the compose mode, typing lowercase y makes nothing appear, and typing lowercase z produces quotation marks! I tried using a different (brand new) keyboard, and the problem remained. I tried those two websites in the Safari browser, and there were no problems.
Attached screenshots

All Replies (3)

FredMcD
FredMcD
more options

Clint B said

. . . . on certain websites

How many websites are affected? Are they related?

Type about:preferences#content<enter> in the address bar. Across from fonts and colors, press the Advanced button. On the bottom, turn on Allow Web Sites To Choose Their Own.

Fonts Information - Detected via Flash http://browserspy.dk/fonts-flash.php?detail=1

FredMcD
FredMcD
more options

Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

If there is still a problem, Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Note that this symbol is actually a long dash.

See also: