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

I just got a new laptop it won't let me full screen a video that I am watching. What should I try?

more options

I am using a site called couchtuner and when I am using Firefox and I press the full screen button and nothing happens. The video keeps playing it just doesn't go full screen. I have gone on youtube but those videos go full screen just fine. It also goes full screen if I use microsoft edge.

I am using a site called couchtuner and when I am using Firefox and I press the full screen button and nothing happens. The video keeps playing it just doesn't go full screen. I have gone on youtube but those videos go full screen just fine. It also goes full screen if I use microsoft edge.

All Replies (4)

more options

The video code on the site may not have Full-screen support have you tested this using a different browser?

more options

It works fine on a different browser, just not Firefox

more options

It is possible that the video is played in an iframe and that the outermost iframe is missing the allowfullscreen=true attribute that Firefox needs.

This can happen if there are multiple iframes nested and only the iframe with the video has this attribute. You can possibly check this in the Inspector via the right-click context menu.

Modified by cor-el

more options

Can you give a link directly to a page where this problem occurs, assuming no login is needed?