There seems to be a MAJOR problem (blocking/memory leak) in "subject: House", also known as the Firefox Start Page, at 26.0 Firefox on Windows!

There seems to be a MAJOR problem (blocking/memory leak) in "subject: House", also known as start up Firefox, 26.0 Firefox Page, Windows!

seen on:
-Windows 7 x 64 machine with 12 GB of RAM and high performance CPU (core i7-920)
-Comments Machine virtual WinXP SP3 (in Oracle VirtualBox) running on the same computer
-Intel Atom D525 netbook with 4 GB of RAM, running Win7 x 64

None of these machines are connected through Sync or something like that. The Firefox instance on the virtual machine is a fresh install / clean.

The problem:
-100% of cpu usage for 10 seconds, (util in XP) memory usage goes up to 1.7 GB
-If "subject: House" is actually the Firefox Start Page, it blocks the computer at startup of Firefox for 10 seconds
-If "subject: House" isn't the Firefox Start Page, startup is fine - BUT if I press the "home" on the toolbar button it loads "on: House" which causes the same question once again

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Sounds that there is a problem with one of the code snippets that are responsible. I've seen several reports on this issue.

You can set the browser.aboutHomeSnippets.updateUrl pref an empty string on the subject: the page of config to disable loading (new) checked to see if that helps.

You can open the topic: config page through the address bar

You must remove the ' storage\moz-security-about + origin "folder in the folder of Firefox to delete already profile stored clips.

You can use this button to go to the Firefox profile folder:

Tags: Firefox

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