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Every time I start Firefox it displays as 100%. I prefer 80%. Do I have to change it every time?

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Every time I start Firefox it displays as 100%. It's too big for me. I prefer 80%. Do I have to change it every time? I can't save the changes.

Every time I start Firefox it displays as 100%. It's too big for me. I prefer 80%. Do I have to change it every time? I can't save the changes.

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In case you use "Clear history when Firefox closes" or otherwise clear history:

  • do not clear the Site Preferences

Clearing "Site Preferences" clears all exceptions for cookies, images, pop-up windows, software installation, passwords, and other website specific data.

Clearing cookies will remove all specified (selected) cookies including cookies with an allow exception that you would like to keep.


You can use an extension to set a default font size and page zoom on web pages.