All the applications I've checked (Libre Office, Opera, Caja etc) are using the fonts I set in the Appearance Preferences, with the exception of Firefox, which is using its own (hard to read) font in menus and dialog boxes:

How can I get Firefox to use the fonts I set in Appearance Preferences?
I'm also having another issue with Firefox where the fonts on web pages are extremely blurry and hard to read. I looked what the font settings Firefox used in Windows and found it to be:
Default: Times New Roman
Proportional: Serif
Serif: Times New Roman
Sens Serif: Arial
Monospace: Courier New
I tried setting these fonts in Mint Firefox but website fonts are still extremely blurry (Windows left, Mint right):

Opera under Mint looks largely the same as Firefox under Windows, so it looks like its' a problem with Firefox under Mint.
It's not unique to one website, and I'm seeing blurry fonts everywhere in Firefox Mint. This makes Firefox pretty much unusable under Mint, but since Firefox is my preferred browser I'd like to be able to fix it.
Any idea how to fix the font rendering in Firefox?
Thanks for any advice you can offer.





