Rated 5 out of 5 stars

Убирает эту бесячую всплывающую надпись (например, в youtube). Главное, чтобы не прекращало работать с обновлениями версии Firefox.

This review is for a previous version of the add-on (3.0). 

Rated 5 out of 5 stars

Simple and effective! Firefox 46

This review is for a previous version of the add-on (3.0). 

Rated 1 out of 5 stars

It doesn't work.

This review is for a previous version of the add-on (2.0). 

Rated 4 out of 5 stars

Has worked rather well so far, however over the last few days YouTube seem to have changed something, as is their wont, so now the alert appears briefly every time again. Would you please look into it. Edited: the alert appears briefly on all sites.

This review is for a previous version of the add-on (1.0-signed). 

Use version 2.0
https://addons.mozilla.org/ru/firefox/addon/hide-fulscreen-alert/versions/

Rated 1 out of 5 stars

Now not work. Firefox 43

This review is for a previous version of the add-on (1.0-signed). 

Use version 2.0
https://addons.mozilla.org/ru/firefox/addon/hide-fulscreen-alert/versions/

Rated 5 out of 5 stars

This works perfect on the latest version of firefox
thank you

This review is for a previous version of the add-on (1.0-signed). 

Rated 5 out of 5 stars

Thank you.

Folks, did you notice since Firefox 42 was released that every time when you open a full screen Youtube video, the same annoying message appears. It says to press escape to exit full screen. Yes, there was an about:config entry that allowed deleting this message but Firefox 42 changed something and that no longer works.

This extension nicely eliminates that message. To the developer, thank you so much.

This review is for a previous version of the add-on (1.0-signed).