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how to increase and keep toolbar/bookmarks fonts sizes. They keep reverting upon exit of browser.

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how to increase and keep toolbar/bookmarks fonts sizes. I accessed the font sizes thru about:config. Then devp. Then layout.css.devPixelsPerPx. They keep reverting to the tiniest of fonts upon exit of browser.

how to increase and keep toolbar/bookmarks fonts sizes. I accessed the font sizes thru about:config. Then devp. Then layout.css.devPixelsPerPx. They keep reverting to the tiniest of fonts upon exit of browser.

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You can check for problems with preferences. You can delete possible user.js and numbered prefs-##.js files and rename/remove the prefs.js file to reset all prefs to the default value including prefs set via user.js and prefs that are no longer supported in current Firefox releases.

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.