How to prevent "your search settings have been restored to their setting defaut" ?
Les moteurs de recherche se réinitialisent à chaque ouverture d'une page firefox, me ramenant le moteur de recherche yahou que je ne veux pas, avec le message suivant "your search settings have been restored to their setting defaut" ! Comment empêcher cela ?
Solution choisie
Do you have security software that might reset the search settings?
Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes). See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears. You can use "Disable all add-ons" on the Safe mode start window to disable all extensions. You have to close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")
See also http://kb.mozillazine.org/Preferences_not_saved and How to fix preferences that won't save
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Solution choisie
Do you have security software that might reset the search settings?
Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes). See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears. You can use "Disable all add-ons" on the Safe mode start window to disable all extensions. You have to close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")
See also http://kb.mozillazine.org/Preferences_not_saved and How to fix preferences that won't save
That was actually a plugin. I've followed your advices and found it. I desactivated it and everything is all right now ! Thanks a lot !