Firefox 12.0. Window Vista Business SP2.
My new tab page is being reset to "http://u-search.net/?a=1&e=1".
First I assumed this was a one-off and went into "tools", "options", "general" tab, "home page" and reset it back to my usual preference "about:blank".
The next time I restarted Firefox it had reverted to the u-search entry again.
I've spent the afternoon scouring the net for a solution and was advised, amongst other things, to check various entries in "about:config". Sure enough there were seven different u-search entries (listed below), which I modified back to default settings. Yet the config file entries all reverted back to u-search on restart.
browser.newtab.url : http://u-search.net/?a=1&e=1 browser.search.defaultengine : u-Search browser.search.defaultenginename : u-Search browser.search.defaulturl : http://u-search.net/?a=1&e=2&q= browser.search.order.1 : u-Search browser.startup.homepage : http://u-search.net/?a=1&e=1 keyword.URL : http://u-search.net/?a=1&e=2&q=
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It sounds like you got infected with a malicious Third-Party Add-on.
First, update to Firefox 15.0.1. Update Firefox to the latest version
Then, try to Reset Firefox Refresh Firefox - reset add-ons and settings
Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
- Do not click the Reset button on the Safe mode start window or otherwise make changes.
You can check for problems with preferences and try to rename or delete the prefs.js file and possible numbered prefs-##.js files and a possible user.js file to reset all prefs to the default values.
Thanks very much. I did exactly as prescribed and yes, no sign of u-search.
I do still believe there would be benefit in optionally allowing users to accept or reject changes to the config file(s).
I also believe your prescribed suggestions should be presented prior to other problem users entering their own questions (e.g. this support site already recommended some checks before I asked my question - latest update and Firefox reset could potentially be added to that list, perhaps?)