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

Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

Firefox will start running, but wont open into an interactable window.

  • 2 fhreagra
  • 3 leis an bhfadhb seo
  • 1 view
  • Freagra is déanaí ó cor-el

Mastermind77
Mastermind77
more options

Every time I click on Firefox to open a window, the taskbar icon and task manager say that it is open, but no window appears on my screen. If I hover over the icon on the taskbar, I can see the window, and even navigate to frequent pages by right clicking, but I can't SEE any Firefox window open.

Every time I click on Firefox to open a window, the taskbar icon and task manager say that it is open, but no window appears on my screen. If I hover over the icon on the taskbar, I can see the window, and even navigate to frequent pages by right clicking, but I can't SEE any Firefox window open.

Réiteach roghnaithe

Close Firefox. Open your file browser to this hidden location:

  • Mac: *~/Library/Application Support/Firefox/
  • Linux: *~/.mozilla/firefox/
  • Windows: %AppData%\Mozilla\Firefox\
  • *C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\

Locate the xulstore.json file. Then rename or delete it. Restart Firefox.

Read this answer in context 👍 1

All Replies (2)

FredMcD
FredMcD
more options

Réiteach Roghnaithe

Close Firefox. Open your file browser to this hidden location:

  • Mac: *~/Library/Application Support/Firefox/
  • Linux: *~/.mozilla/firefox/
  • Windows: %AppData%\Mozilla\Firefox\
  • *C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\

Locate the xulstore.json file. Then rename or delete it. Restart Firefox.

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

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

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