This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

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

  • 2 replies
  • 2 have this problem
  • 3 views
  • Last reply by cor-el

more options

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.

All Replies (2)

more options
more options

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.