FireFox - Set a default zoom level for all websites

December 2016

If you want to have the same zoom level for every visited website:
  • Open Firefox.
  • In the address bar type the following command:
  • about:config
  • Click on the "I'll be careful, I promise..." button
  • In the Filter field type:browser.zoom.siteSpecific
  • Double click and set its value to False.
  • Close the about:config window and restart Firefox.

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