A lot has happened ever since initialization of webrender since 2017. Back then even simple 2 core computer had issues and even some smartphones experienced lags and or even crashed it and unable to use it at all. A lot has happened too mid 2018 with Nightly, they studied for 2 weeks for the webrender. Any who, our devices are replaced when we were forced to use Windows 10 and differentiated Windows updates, we now most of us already bought new devices. New PC's, new desktop's and new smartphone's. So, basically enabling it should not be an issue at all.
Here is what you can do about it. If you want to use your devices own hardware grafik to render pages with webrender instead of using built-in Firefox software webrender. It is so much stable, clear and faster, if it is not, you can always revert it back.
When you start your browser, type in
about:config
type in search box "GFX.webrender."
gfx.webrender.
on some certain webrender make sure these are as follows: " gfx.webrender.all " is set to ' True '.
gfx.webrender.all
" gfx.webrender.compositor.force-enabled " is set to ' True '.
gfx.webrender.compositor.force-enabled
" gfx.webrender.enable-capture " is set to ' True '.
gfx.webrender.enable-capture
" gfx.webrender.enabled " is set to ' True '.
gfx.webrender.enabled
" gfx.webrender.software " is set to ' False'.
gfx.webrender.software