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Shrinking Text

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I notice when I am on Facebook or some wiki sites that all the text will randomly shrink. Only the text though, all images and videos remain the same size. Website zoom is confirmed at 100% and my firefox is up to date. The only thing that fixes it is the refresh the page but its temporary.

I notice when I am on Facebook or some wiki sites that all the text will randomly shrink. Only the text though, all images and videos remain the same size. Website zoom is confirmed at 100% and my firefox is up to date. The only thing that fixes it is the refresh the page but its temporary.

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Did you try to reset the page zoom via "Ctrl+0" (zero) in case something is still stuck ?

Are you using full page zoom or zoom text only ?

  • Options/Preferences -> General -> Language and Appearance -> Zoom

This can be a font issue where a smaller font being used for some reason.

You can right-click and select "Inspect Element" to open the builtin Inspector with this element selected.

You can check in the Rules tab in the right panel in the Inspector what font-family is used for selected text. You can check in the Font tab in the right panel in the Inspector what font is actually used because Firefox might be using a different font than specified by the website.


Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or userChrome.css is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window