Type about:preferences#content<enter> in the address bar. Across from fonts and colors, press the Advanced button. On the bottom, turn on Allow Web Sites To Choose Their Own.

You can check for corrupted and duplicate fonts and other font issues: http://www.thexlab.com/faqs/multipleappsquit.html - Font Book 2.0 Help: Checking for damaged fonts http://www.creativetechs.com/iq/garbled_fonts_troubleshooting_guide.html

Firefox has an internal setting that governs both the "chrome" area (toolbars, menus, dialog) and the content area (pages). If you change this, you might need to adjust your global zoom level in NoSquint, but let's give it a try.

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful.

(2) In the filter box, type or paste pix and pause while the list is filtered

(3) Double-click layout.css.devPixelsPerPx and change its value to 1.25 for 25% enlargement from the classic default of 96 pixels per inch, and click OK to see whether that's any better. As you can guess, 1.5 gives you a 50% enlargement, and 2.0 doubles the size.

Since you have a very large monitor, I think one of those should do the trick. However, my experience is with Windows and not Linux...

Can you find a multiplier that works well for the chrome area?

jscher2000 said

Firefox has an internal setting that governs both the "chrome" area (toolbars, menus, dialog) and the content area (pages). If you change this, you might need to adjust your global zoom level in NoSquint, but let's give it a try. (1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful. (2) In the filter box, type or paste pix and pause while the list is filtered (3) Double-click layout.css.devPixelsPerPx and change its value to 1.25 for 25% enlargement from the classic default of 96 pixels per inch, and click OK to see whether that's any better. As you can guess, 1.5 gives you a 50% enlargement, and 2.0 doubles the size. Since you have a very large monitor, I think one of those should do the trick. However, my experience is with Windows and not Linux... Can you find a multiplier that works well for the chrome area?

I tried adjusting "layout.css.devPixelsPerPx" but it only affects the body fonts, and not the menu, tabs, or location bar.

FredMcD said

Type about:preferences#content<enter> in the address bar. Across from fonts and colors, press the Advanced button. On the bottom, turn on Allow Web Sites To Choose Their Own. You can check for corrupted and duplicate fonts and other font issues: http://www.thexlab.com/faqs/multipleappsquit.html - Font Book 2.0 Help: Checking for damaged fonts http://www.creativetechs.com/iq/garbled_fonts_troubleshooting_guide.html

That was not what I was asking. I was referring to the interface fonts (menu, tabs, address bar). Those are the ones I need to change.

Crotalidae75 said

I tried adjusting "layout.css.devPixelsPerPx" but it only affects the body fonts, and not the menu, tabs, or location bar.

It should be global, hmm. A while ago, there were some threads complaining that on Linux, this did not work as smoothly as on other OS'es -- that various intermediate sizes were not supported. I think setting it to 2 might work, but that may well be too large.

Do you want to try version 45.1 of the extension? It's available on the "versions" page here: https://addons.mozilla.org/firefox/addon/theme-font-size-changer/versions/ (March 22, 2016)

jscher2000 said

Crotalidae75 said

I tried adjusting "layout.css.devPixelsPerPx" but it only affects the body fonts, and not the menu, tabs, or location bar.

It should be global, hmm. A while ago, there were some threads complaining that on Linux, this did not work as smoothly as on other OS'es -- that various intermediate sizes were not supported. I think setting it to 2 might work, but that may well be too large.

Do you want to try version 45.1 of the extension? It's available on the "versions" page here: https://addons.mozilla.org/firefox/addon/theme-font-size-changer/versions/ (March 22, 2016)

It's not, apparently, but I found something that does work.

I created a userChrome.css file with this code in it --

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* set default namespace to XUL */

* {font-size: 18px !important;

}

It works just fine. Now my fonts are like the way they used to be before I upgraded. I found this solution in another post similar to this one, with the same problem, from a few years back.

[https://support.mozilla.org/en-US/que.../947261]

All I had to do is create a sub-folder named "chrome" in my /.mozilla/firefox/profile folder, and put that file in it.

That was very good work. Well Done. Please flag your last post as Solved Problem so others will know.