Upon startup Firefox says "Proxy is refusing connections." When I select "Auto-Detect Proxy" from Advanced settings and solve problem, changes are not saved and upon next startup I must select again...!

Firefox 4 was working fine. Then one day, when I started up Firefox, it says "Proxy is refusing connections." I solved this by selecting "Auto-Detect Proxy" from Advanced network settings, but my changes are not saved and upon every start-up I must select it again! (I even completely removed my webroot antivirus protection, as it as hindering many proxy related programs, but this seems to not be the source of the problem)

You can find the connection settings in Tools > Options > Advanced : Network : Connection
If you do not need to use a proxy to connect to internet then select "No Proxy"
See "Firefox connection settings":
* https://support.mozilla.com/kb/Firefox+cannot+load+websites+but+other+programs+can
Start Firefox in <u>[[Safe Mode]]</u> 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
*https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes
See also:
*http://kb.mozillazine.org/Preferences_not_saved

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