pubads.g.doubleclick.net
Whenever I access Youtube site will receive an error as screenshot, accessing to other sites no problem. Tested with IE and Chrome no issue. Completely remove Firefox and reinstall, clear all history data, reset add-ons same issue.
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Try just YouTube.com problem still there?
Start Firefox in Safe Mode {web link}
A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?
Tried safe mode same issue, started with youtube.com it will auto populate www.youtube.com.
Hello hoxuanthinh,
That "pubads.g.doubleclick.net" is malware - see :
Even though Safe Mode didn't make a difference, would you still check Options => Extensions (just to make sure) and also check Windows Control Panel to see if there is anything suspicious. If you find any : remove it.
Also : run all malware scans that are listed in this article (what one doesn't pick up, the other one might) :
https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware
YouTube should now be 'back to normal' again ......
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