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

Security Error: Content at chrome://(...)aboutPrivateBrowsing.css may not load data (...)

  • 1 reply
  • 1 has this problem
  • 5 views
  • Last reply by cor-el

more options

When I open the console in an empty private navigation tab, I get this error message every few minutes.

Security Error: Content at chrome://browser/skin/privatebrowsing/aboutPrivateBrowsing.css may not load data from blob:null/97d4ac60-f4c1-420c-8da6-5f73bc23634b.

(I have never installed Chrome on this system)

When I open the console in an empty private navigation tab, I get this error message every few minutes. Security Error: Content at chrome://browser/skin/privatebrowsing/aboutPrivateBrowsing.css may not load data from blob:null/97d4ac60-f4c1-420c-8da6-5f73bc23634b. (I have never installed Chrome on this system)

All Replies (1)

more options

Firefox uses the "chrome://" protocol to access its internal files and use chrome in other cases like userChrome.css (no relation with Google Chrome).


You can create a new profile as a quick test to see if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.


Try the Firefox version from the official Mozilla server if you currently use a version from the repositories of your Linux distribution.