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Fonts become bold after last update of Firefox

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So I like when my Default Zoom is 120% and when coding above 130% or 140% to see code more clear. For Example, here :

https://www.w3schools.com/js/tryit.asp?filename=tryjs_array_foreach_2

When I was Zooming to 130% fonts were still thin as I like and that because I unchecked this option in Language and Appearance > Advanced > Allow pages to choose their own fonts, instead of your selections above. (and the rest of options was default)

So everything was fine as I wanted. After last update of Firefox fonts become bold when I zoom, and I really don't like it… and when I was coding in Console fonts were also thin, but now bold.

Can anyone help me to fix this as it was before ?

So I like when my Default Zoom is 120% and when coding above 130% or 140% to see code more clear. For Example, here : https://www.w3schools.com/js/tryit.asp?filename=tryjs_array_foreach_2 When I was Zooming to 130% fonts were still thin as I like and that because I unchecked this option in Language and Appearance > Advanced > Allow pages to choose their own fonts, instead of your selections above. (and the rest of options was default) So everything was fine as I wanted. After last update of Firefox fonts become bold when I zoom, and I really don't like it… and when I was coding in Console fonts were also thin, but now bold. Can anyone help me to fix this as it was before ?
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You can possibly use code in userContent.css to increase the font-size and possible set a font-family that looks better for you, Personally, I'm not a big fan of using a dark background font with editors that use context highlighting, as some colors have poor contrast and sometimes I use bold text in such a case.


More info about userContent.css and userChrome.css in case you are not familiar: *https://www.userchrome.org/what-is-userchrome-css.html