I am using the latest version of Xfce Manjaro.
With the latest 94.0 update from Firefox, I suddenly got annoying screentearing, when watching videos but also when scrolling websites. Screentearing is a visual artefact, often visible when the camera moves up and down or when you scroll up and down.
I am so glad that I found a simple solution, that I wanted to post it on the forum in case anyone else has got similar problems.
Go to settings editor
Go to xfwm4 and select it.
Then scroll down to “vblank_mode” and select it.
Press edit and write “glx” in the “value” field.
Save and reboot.
I hope this solution will solve your screentearing problem as well…