Blurry text in sidebar on Linux

[OneOneFour]

In current build when using Linux (Ubuntu 20.04) on Firefox 82, text present in the sidebar is blurry.
This is not seen on Chrome using the same operating system. The cause of this is linked to the drop-shadow filter effect currently being used, when substituted for a box-shadow this bug disappears. Of course as box-shadow is not as visually striking as drop-shadow, we would rather have the drop shadow working if at all possible.

Potential causes for this problem could be a bug with Firefox 82/ current Linux Intel GPU drivers, or it could be potentially an artifact of LCD smoothing (see: https://stackoverflow.com/questions/44897652/font-looks-blurry-on-firefox).

Please feel free to investigate, I have attached an image of the blurry effect:

[OneOneFour]

This may be an issue to do with UI scaling or it has been fixed with firefox. This bug is not seen on firefox 83 on Arch Linux (Linux 5.9.13) on a 1080p screen using nvidia graphics at standard ui scaling.