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!

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.

Under Win 10 Pro, updated to v40.0; "Minimize, FullScreen & Exit" buttons don't work; re-download & re-install didn't fix; downgrading to v39.0.3 fixed it???

  • 1 reply
  • 16 have this problem
  • 9 views
  • Last reply by Bob Hakes

Bob Hakes
Bob Hakes
more options

Running Windows 10 Pro. Updated Firefox to v40.0. In Upper right corner, the Minimize, Full-Screen and Exit buttons did not work and hovering over any of them failed to highlight the button. I re-downloaded the update and re-installed, but problem still existed. As a test, I tried downgrading to v39.0.3, which fixed the problem. I realize that the downgrade may pose a security risk, but it works, and v40.0 doesn't! Prior to downgrading, I tried the Customize option, de-selecting and re-selecting the top menu bar, but neither helped. What next?

Running Windows 10 Pro. Updated Firefox to v40.0. In Upper right corner, the Minimize, Full-Screen and Exit buttons did not work and hovering over any of them failed to highlight the button. I re-downloaded the update and re-installed, but problem still existed. As a test, I tried downgrading to v39.0.3, which fixed the problem. I realize that the downgrade may pose a security risk, but it works, and v40.0 doesn't! Prior to downgrading, I tried the Customize option, de-selecting and re-selecting the top menu bar, but neither helped. What next?

Chosen solution

BOBHAKES said

Further troubleshooting: I opened Firefox v40.0 in safe mode, and problem no longer occurred. Then re-started, opening Firefox v40.0, using "Refresh" option, and problem no longer occurred. After re-adding desired Plug-Ins and Extensions (eliminating some older and/or rarely used items), I re-started Firefox, and problem no longer occurs. The problem was evidently caused by one of the eliminated extensions or plug-ins. No further help needed.
Read this answer in context 👍 3

All Replies (1)

Bob Hakes
Bob Hakes Question owner
more options

Chosen Solution

BOBHAKES said

Further troubleshooting: I opened Firefox v40.0 in safe mode, and problem no longer occurred. Then re-started, opening Firefox v40.0, using "Refresh" option, and problem no longer occurred. After re-adding desired Plug-Ins and Extensions (eliminating some older and/or rarely used items), I re-started Firefox, and problem no longer occurs. The problem was evidently caused by one of the eliminated extensions or plug-ins. No further help needed.