I've had this weired problem with Firefox. While i was browsing an error message come up saying cannot connect to the website... check proxy settings. In other tabs there were some chinese sentence saying basically the same thing. Other browsers worked fine. So i did a research and found this forum: https://support.mozilla.org/en-US/questions/715401
Thanks for the help
Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.
(If you're not using it, switch to the Default theme.)
Once you get the pop-up, just select "'Start in Safe Mode"
If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.
To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.
When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.
Some preferences can be reset at startup by an extension or by a setting is an external file such as user.js. The suggestion by colbabomb will help you rule out an extension. To hunt down a user.js file, try this article: How to fix preferences that won't save.
External malware also is a possibility. You may want to run some supplemental scans. These three tools are highly regarded (and free):
Edit: Oops, don't know of security security scanners for Linux, sorry.
This is likely caused by an extension, possibly Proxy List 2.2 that shows in the system details list.
Hi Guys, Thanks for your responses.
I was in safe mode when i set connection settings to "no proxy" in: Edit->Preferences->Advanced->Network->Settings->Co
To All of you: At the moment with Foxy Proxy disabled everything seems to be working fine i can browse without any problem. I just want to find out, what can change your proxy setting and reset a new proxy for you that you have know idea about while you are just surfing on the internet. It was not a new update of the firefox or newly installed add-on it just came out of the blue. That is why i'm worried about some malicious threat or maybe a bug. On linux i have never had a virus or something. Is there any at all for Linux which causes similar symptoms.
If you need anymore information about a file, crash log or something let me know. Other than that I can live without Foxyproxy. I just don want others to be effected by this problem.
The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions (you have to manually reinstall them after), Open websites, and some Preferences.
To Reset Firefox do the following:
Further information can be found in the Refresh Firefox - reset add-ons and settings article.
Did this fix your problems? Please report back to us!