Fix for Firefox and Tor browser scale problems in Parallels VM

If you find yourself trying to use Firefox or the Tor Browser in a Parallels VM and are having scaling problems where you’re either stuck with extremely small text in retina mode or unusably scaled browsers in scaled mode, this fix is for you.

Firefox based browser don’t scale properly

Step 1: Go to the application in Finder

Step 2: Right click/context click and select Get Info in the context menu

Step 3: Make sure “Open in low resolution” is checked

Step 4: Fully quit and restart your browsers

Step 5: Enjoy