Add Firefox workaround

Signed-off-by: Tommy <contact@tommytran.io>

Quality of Life.md

@@ -67,10 +67,10 @@ Note that I just use allow here, because the vault VM on a new Fedora 41 already
 ### qvm-screenshot-tool
 
 ```bash
-sudo qubes-d0m-update zenity
+sudo qubes-d0m-update maim zenity
 ```
 
-Copy [this file](https://github.com/ben-grande/qubes-qvm-screenshot-tool/blob/master/qvm-screenshot) to `/usr/local/bin` in dom0.
+Copy [this file](https://github.com/ben-grande/qubes-qvm-screenshot-tool/blob/master/qvm-screenshot) to `/usr/local/bin` in dom0. Maim is needed until [this issue](https://github.com/ben-grande/qubes-qvm-screenshot-tool/issues/1) is resolved.
 
 ```bash
 sudo chmod +x /usr/local/bin
@@ -86,6 +86,12 @@ One trivial way for malicious applications to exfiltrate data from an offline VM
 
 Go to `edge://flags` and set "Auto Dark Mode for Web Contents" to "Enable with selective inversion of non-image elements". This reduces flashbangs a lot.
 
+### Firefox based browsers
+
+Currently Firefox based browsers [will break](https://github.com/QubesOS/qubes-issues/issues/8612#issuecomment-1764832181) when you try to open a YouTube video in fullscreen if their window is maximized. To workaround this, set `full-screen-api.ignore-widgets` in `about:config` to true. 
+
+I have no idea if this will make you more fingerprintable or not.
+
 ### Bitwarden & Element Flatpak
 
 These apps require the keyring to be created first to work properly. Simply open a browser like Microsoft Edge and set an empty password for the keyring before using them.