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why firefox show the helvetica font very thick not like it recognize it as chrome?

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many websites are using bootstrap, by default the font is Helvetica. Why Firefox can't recognize it or show it smooth and nice like as chrome, instead it shows a thick font which aren't fun to read. This is not since today, it's since bootstrap came out and this is really annoying.

many websites are using bootstrap, by default the font is Helvetica. Why Firefox can't recognize it or show it smooth and nice like as chrome, instead it shows a thick font which aren't fun to read. This is not since today, it's since bootstrap came out and this is really annoying.

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Does this also happen based on the fonts that are installed on the local computer?

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It is possible that the font is corrupted and that Firefox is using a different font instead.

You can right-click on a web page and select "Inspect Element" to open the Inspector (Firefox/Tools > Web Developer). You can check the font used for selected text in the Font tab in the right pane of the Inspector.


You can do a font test to see if you can identify corrupted font(s).

You can try different default fonts and temporarily disable website fonts to test the selected default font.

  • Tools > Options > Content : Fonts & Colors > Advanced
  • [ ] "Allow pages to choose their own fonts, instead of my selections above"