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

Dual Screen Setup Screws Up Default Firefox Window Size

  • 1 reply
  • 12 have this problem
  • 2 views
  • Last reply by FFmurphy

more options

Unfortunately it's impossible to reply to this thread: https://support.mozilla.com/tiki-view_forum_thread.php?comments_... although the problem described there isn't solved at all.

Quote from the OP: "Firefox is only checking the resolution of the primary monitor when it is opened or when a new window is opened. This is not an issue if both monitors are the same resolution or if the primary monitor is set to a higher resolution than the secondary monitor. But, as in my case, if the primary monitor is set to a lower resolution than the secondary monitor, Firefox will resize any new window that is larger than the resolution of the primary monitor down to size of the primary monitor."

Personally, I have been using MSIE 6.0 until it became unusable since any major site stopped supporting it. Now, instead of upgrading to 7.x or 8.x, I chose to install Firefox ... and the first thing that this "state of the art browser" is giving to me as a welcome present is the insight, that it is even too dumb to remember its actual default window size!

Although stored correctly in localstore.rdf (height="1170") this friggin bastard resizes to 994px height on every startup and refuses to accept the fact that the screen it opens on has a height of 1200px. Something the good old MSIE didn't have any problems with to recognize!

Conclusion of > 1 hour online research: no solution available.

Well done, Mozilla, brilliant job :\

Unfortunately it's impossible to reply to this thread: [https://support.mozilla.com/tiki-view_forum_thread.php?comments_parentId=365472&forumId=1] although the problem described there isn't solved at all. Quote from the OP: ''"Firefox is only checking the resolution of the primary monitor when it is opened or when a new window is opened. This is not an issue if both monitors are the same resolution or if the primary monitor is set to a higher resolution than the secondary monitor. But, as in my case, if the primary monitor is set to a lower resolution than the secondary monitor, Firefox will resize any new window that is larger than the resolution of the primary monitor down to size of the primary monitor."'' Personally, I have been using MSIE 6.0 until it became unusable since any major site stopped supporting it. Now, instead of upgrading to 7.x or 8.x, I chose to install Firefox ... and the first thing that this "state of the art browser" is giving to me as a welcome present is the insight, that it is even too dumb to remember its actual default window size! Although stored correctly in ''localstore.rdf'' (height="1170") this friggin bastard resizes to 994px height on every startup and refuses to accept the fact that the screen it opens on has a height of 1200px. Something the good old MSIE didn't have any problems with to recognize! Conclusion of > 1 hour online research: no solution available. Well done, Mozilla, brilliant job :\

All Replies (1)

more options

The only solution (well, it's not really a solution, it's a miserable workaround) was to exchange the assingment of the primary and the scondary display, including all the negative side effects you can imagine.

Hopefully Firefox will gain a higher grade of intelligence one day.