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How can I delete AUTHORITIES under Firefox Preferences certificates

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In FIREFOX - PREFERENCES - ADVANCED - VIEW CERTIFICATES - AUTHORITIES: Ho can I delete authorities from reappearing? Thank you

In FIREFOX - PREFERENCES - ADVANCED - VIEW CERTIFICATES - AUTHORITIES: Ho can I delete authorities from reappearing? Thank you

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If you really want to remove build-in root certificates then you can edit the certificates and remove all three check marks.

Btw:
Firefox 2.0.0.17 from 2008 is pretty old.
Why are you still using such an old version (latest was 2.0.0.20) and haven't updated to Firefox 3 versions?