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.

Rohkem teavet

How do I stop the menu from disappearing and reappearing as I move down the list, when the window is smaller than drop-down list?

  • 1 vastus
  • 3 on selline probleem
  • 19 views
  • Viimati vastas cor-el

more options

If the window is smaller than the menu drop-down list and I click on a menu name the list appears and immediately disappears with a faint outline visible. As I move down the list the items appear briefly and then disappear again. Clicking on the location of an item on the list does NOT activate that item.

If the window is smaller than the menu drop-down list and I click on a menu name the list appears and immediately disappears with a faint outline visible. As I move down the list the items appear briefly and then disappear again. Clicking on the location of an item on the list does NOT activate that item.

All Replies (1)

more options

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).


In Firefox 4 and later Safe mode disables extensions and disables hardware acceleration.

  • Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"

If disabling hardware acceleration works then check if there is an update available for your graphics display driver.