We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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.

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

newest update kills FF... tried everything downloaded old version and it works fine... your ball

more options

Firefox 49.0.1 update seems to load, shows brief busy icon .. shows loaded in files, shows as running in task mgr. Removing and reloading does nothing even with shutdown between... safe mode, administrator run... nothing. Reloaded old 48 ran without a pause.

Hints

Firefox 49.0.1 update seems to load, shows brief busy icon .. shows loaded in files, shows as running in task mgr. Removing and reloading does nothing even with shutdown between... safe mode, administrator run... nothing. Reloaded old 48 ran without a pause. Hints

Alla svar (2)

more options

Let's start with this;

Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}


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).

Is the problem still there?

more options

Hi blackcrow8, Your issue is very similar to mine. Take a look at https://support.mozilla.org/en-US/questions/1139904