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I can't open google,yahoo,facebook,and some other sites.

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I cannot open google.com, facebook.com, twitter.com, tomshardware.com, microsoft.com, and live.com (so far these sites that i know cannot be opened in firefox), it just says server not found. But I can open other sites (even google.co.id is OK,but not google.com). What I've tried -open those sites in safe mode -clear cache and cookies -scan my pc with microsoft safety scanner Other browsers work perfectly, other pc/smartphone (on the same network) also work fine. I'm on windows 8.1. Thanks in advance

I cannot open google.com, facebook.com, twitter.com, tomshardware.com, microsoft.com, and live.com (so far these sites that i know cannot be opened in firefox), it just says server not found. But I can open other sites (even google.co.id is OK,but not google.com). What I've tried -open those sites in safe mode -clear cache and cookies -scan my pc with microsoft safety scanner Other browsers work perfectly, other pc/smartphone (on the same network) also work fine. I'm on windows 8.1. Thanks in advance

Chosen solution

There is a tutorial already written. please follow this tutorial. https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can This may solve your problem. thank you

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Chosen Solution

There is a tutorial already written. please follow this tutorial. https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can This may solve your problem. thank you

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Thanks for your reply Previously I've tried to reinstall firefox,scan for malwares/viruses, and restore windows but failed solved the problem. Disabling ipv6 looks like solve my problem (I dont know the 'side-effect' though') Thanks, s.Turjoe