proxy settings always default to manual
proxy settings always default to manual and wont open web pages or connect to internet - when I try to change the settings to 'no proxy' via tools/options/advanced/network/settings - Firefox will open one web page - if I try to open another web page in a new tab - error occurs and cant connect message due to proxy settings appears - if I close the session and open a new one, same result and I have to change proxy settings for each site I visit - annoying - so how do I fix this please?
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See:
- http://kb.mozillazine.org/Preferences_not_saved
- https://support.mozilla.com/kb/Preferences+are+not+saved
Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
- Don't make any changes on the Safe mode start window.
- https://support.mozilla.com/kb/Safe+Mode