Windows 10 will reach EOS (end of support) on October 14, 2025. For more information, see this article.

Den här webbplatsen har begränsad funktionalitet medan vi utför underhåll för att förbättra din upplevelse. Om en artikel inte löser ditt problem och du vill ställa en fråga har vi vår gemenskap som väntar på att hjälpa dig på @FirefoxSupport på Twitter, /r/firefox på Reddit.

Avatar for Username

Sök i support

Akta dig för supportbedrägerier: Vi kommer aldrig att be dig att ringa eller skicka ett sms till ett telefonnummer eller dela personlig information. Rapportera misstänkt aktivitet med alternativet "Rapportera missbruk".

Läs mer

Denna tråd har arkiverats. Ställ en ny fråga om du behöver hjälp.

After upgrading from 54.0.1 to 55.0.2 - Firefox will not open

  • 1 svar
  • 3 har detta problem
  • 3 visningar
  • Senaste svar av cor-el

wischjj
wischjj
more options

We are using the standalone installer to upgrade our fleet from 54.0.1 to 55.0.2 and after the install Firefox will not load. It shows up in Task Manager processes, but the window doesn't actually open. I have tried 55.0, 55.0.1, and 55.0.2 - none of them work. I even tried going to Help-About-Update, the same thing happens.

We are using the standalone installer to upgrade our fleet from 54.0.1 to 55.0.2 and after the install Firefox will not load. It shows up in Task Manager processes, but the window doesn't actually open. I have tried 55.0, 55.0.1, and 55.0.2 - none of them work. I even tried going to Help-About-Update, the same thing happens.

Alla svar (1)

cor-el
cor-el
  • Moderator
more options

Some basic Troubleshooting steps you can try:

Try to start Firefox in Safe Mode to see whether that works.

  • Windows: hold down the Shift key while starting Firefox
  • Mac: hold down the Options key while starting Firefox

You can create a new profile to test if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.

Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen or hold down the Shift key) to see whether that has effect.