See bug 456034 and the last review (June 26, 2008) of the "Bandwidth Meter and Diagnostics" extension - apparently it breaks SSL error page, so that adding an exception isn't possible. With a major issue like this, that extension shouldn't be public. According to description there is a newer version available - maybe that one fixes the bug, if so it should be made public.
I've sandbox'ed the add-on ...notified the author via email as well. Closing.
Status: NEW → RESOLVED
Last Resolved: 10 years ago
Resolution: --- → FIXED
Verified; sandboxed indeed.
Status: RESOLVED → VERIFIED
Component: Add-ons → Administration
QA Contact: add-ons → administration
Product: addons.mozilla.org → addons.mozilla.org Graveyard
You need to log in before you can comment on or make changes to this bug.