Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

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

When I open my firefox browser it opens minimized in the upper left corner of my monitor, this seems to have happened with the lastest update??

  • 1 reply
  • 1 has this problem
  • 3 views
  • Last reply by FredMcD

more options

When I now open my firefox browser it will only open in a minimized window located in the upper left corner of my monitor. I then need to click the "minimize window to change to "maximize" and then click it to open the window to a full size screen. As I open new tabs after this they open in full size screen mode. But once I close the browser I have to start all over again. Is this happening because of the new update? Would appreciate your help please. Note: I did not take a full pic of my desktop, just the top portion that includes what I see when I open the browser.

When I now open my firefox browser it will only open in a minimized window located in the upper left corner of my monitor. I then need to click the "minimize window to change to "maximize" and then click it to open the window to a full size screen. As I open new tabs after this they open in full size screen mode. But once I close the browser I have to start all over again. Is this happening because of the new update? Would appreciate your help please. Note: I did not take a full pic of my desktop, just the top portion that includes what I see when I open the browser.
Attached screenshots

Chosen solution

https://support.mozilla.org/en-US/kb/changes-toolbars-and-window-sizes-are-not-saved You may have corrupt xulstore.json file.

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

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

Search for the above file. Then rename or delete it. Restart Firefox.

Read this answer in context 👍 0

All Replies (1)

more options

Chosen Solution

https://support.mozilla.org/en-US/kb/changes-toolbars-and-window-sizes-are-not-saved You may have corrupt xulstore.json file.

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

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

Search for the above file. Then rename or delete it. Restart Firefox.