hello, are you referring to links in google's search results? if so, this is part of google's settings for the page - go to google.com/preferences and disable "Open each selected result in a new browser window" (new window transates into new tab in firefox).

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

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Your System Details shows;

Installed Plug-ins

Adobe Shockwave for Director Netscape plug-in, version 12.1.3.153 Adobe Shockwave for Director Netscape plug-in, version 12.1.2.152

Having more than one version of a program may cause issues.

It was disabled, still have this problem.

I disabled one Adobe Shockwave, not works.

I tried all this things, I reinstaled firefox, nothing works. Firefox is my favourite browser so I must solve this problem.

cor-el nothing works from that pages ...I think I will reinstal windows

Make sure you backup everything.

I discover something strange...When I use private firefox problem disapear.