by certifiedbug on October 5, 2011
in Browser
McAfee ScriptScan has been blocked for your protection.
Why was it blocked?
This add-on causes a high volume of crashes.
Who is affected?
Users of McAfee ScriptScan versions 14.4.0 and below for all versions of Firefox and SeaMonkey.
What does this mean?
Users are strongly encouraged to disable the problematic add-on or plugin, but may choose to continue using it if they accept the risks described.
https://addons.mozilla.org/en-US/firefox/blocked/i42
Surfing to the “Add-ons Blocklist” page one is greeted with,
This article is no longer maintained, so its content might be out of date.
Just saying… 
by certifiedbug on April 6, 2011
in Browser
One I’d already disabled is listed in the top two, 74% slowdown. 
Add-ons provide many useful features and functions, but they can also cause Firefox to become slower. Some add-ons can even slow Firefox to a crawl and make it difficult to use for regular web browsing. If you think add-ons might be the reason Firefox is lethargic, check the list below for some of the biggest bottlenecks. And remember, for best performance you should disable add-ons that you no longer use regularly.
Add-ons with Slowest Start-up
The following add-ons have the most impact on how long it takes Firefox to start up.
https://addons.mozilla.org/en-US/firefox/performance/
http://www.wired.com/epicenter/2011/04/mozilla-publishes-list-of-the-50-slowest-firefox-add-ons/
by certifiedbug on January 21, 2011
in Browser
Mozilla
The current shipping version of the Skype Toolbar is one of the top crashers of Mozilla Firefox 3.6.13, and was involved in almost 40,000 crashes of Firefox last week. Additionally, depending on the version of the Skype Toolbar you’re using, the methods it uses to detect and re-render phone numbers can make DOM manipulation up to 300 times slower, which drastically affects the page rendering times of a large percentage of web content served today (plain English: to the user, it appears that Firefox is slow loading web pages). We believe that both of these items constitute a major, user-facing issue, and meet our established criteria for blocklisting an add-on.
http://blog.mozilla.com/addons/2011/01/20/blocking-the-skype-toolbar-in-firefox/
