Whenever a new window (or even Firefox windows program such as Add-ons, bookmarks, settings, etc.) is opened, Firefox hangs for 30 seconds before you open it.

I have reset Firefox, then reinstalled, removed all extensions and plugins, uninstalled and reinstalled Flash Player, Java updated, etc. I also created new profiles, which have the same problem.

The problem does not appear in Mode safe, which is strange because I have disabled all of the built-in extensions and you run the program in normal mode, and the problem persists. At the moment I don't use any extensions, plugins and none of the themes and Firefox still freezes for a short period of time whenever I try to open a new window.

This problem does not occur in IE or Chrome. I have not installed any programs recently; the problem started happening randomly.

Hello

Safe mode also disables themes (appearance) in (Alt + T) Tools > Add-ons. and hardware acceleration - the manual setting is in Tools > Options > Advanced > general > use hardware acceleration when available. All these settings/options/additional custom modules can also be individually or collectively disabled/enabled/changed to normal mode of Firefox to see if a theme, or hardware acceleration is causing issues. Deactivation/activation of hardware acceleration and some types of modules in normal mode may require a restart of Firefox - is a fast way to restart Firefox press SHIFT + F2, type reboot and Enter.

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