Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

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. Please ask a new question if you need help.

Why does Firefox open in small window?

  • 1 reply
  • 1 has this problem
  • 2 views
  • Last reply by cor-el

cavalosjr
cavalosjr
more options

When I open Firefox on a MacBook Pro the screen opens in a small window. How do I get Firefox to open normally?

When I open Firefox on a MacBook Pro the screen opens in a small window. How do I get Firefox to open normally?

All Replies (1)

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

You can try to rename/remove xulstore.json in the Firefox profile folder with Firefox closed.

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

The Firefox profile folder is in a hidden location in the Library folder in your user directory (~/Library is a hidden folder).

  • ~/Library/Application Support/Firefox/Profiles/<profile>/