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!

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

Strange message appears in a box on screen whenever a video plays

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

more options

Whenever I play a video, I get a strange box appear on screen that I can't get rid of (I've included a picture). I'm thinking I might have accidentally hit some strange combination of keys on my keyboard, but it happens every time. Any suggestions?

Whenever I play a video, I get a strange box appear on screen that I can't get rid of (I've included a picture). I'm thinking I might have accidentally hit some strange combination of keys on my keyboard, but it happens every time. Any suggestions?
Attached screenshots

All Replies (2)

more options

Oh, that is very broken. Recent versions of Firefox display a small blue icon on the right side of the player for picture-in-picture. Something seems to be wrong with that icon on yours. If you don't use this feature, you could disable it here:

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button accepting the risk.

(2) In the search box in the page, type or paste videocon and pause while the list is filtered

(3) Double-click the media.videocontrols.picture-in-picture.enabled preference to switch the value from true to false

Any improvement?

More info on about:config: Configuration Editor for Firefox.

Alternately, if you want to get that feature working, I would lean toward replacing the program files, but perhaps someone else has an easier idea. (Before doing anything drastic, I suggest backing up your data: Back up and restore information in Firefox profiles)

more options

What Firefox locale do you use in case your current locale is broken ?

  • Options/Preferences -> General -> Language:
    Choose the languages used to display menus, messages, and notifications from Firefox.

Are you using a language pack that provides string translations for the user interface?

You can try to reinstall Firefox on top of the current installation.