Skip to main content

Mozilla Publishes List of Add-ons That Slow Down Firefox

Firefox’s core strength has been its extensions that allows the browser to adapt itself to the different needs of different users. But extensions also are the primary cause of most of Firefox problems, from memory leaks to security attacks to slow startups. To address these concerns Mozilla has decided to crack down on add-ons that adds precious seconds (or milliseconds) to Firefox start-up time.

Almost all extensions has a negative impact on the performance of the browser – just the mileage vary from extension to extension. According to Mozilla,

On average, each add-on you install adds about 10% to Firefox start-up time. For some users that’s mere milliseconds, and for others it may be half a second; it all depends on the hardware and software of each individual. Many add-ons add less than 10%, and unfortunately, there are quite a few add-ons that add more. But based on our real-world performance data, installing 10 add-ons will double Firefox’s start-up time.

Within the next two weeks, Mozilla will begin displaying warnings for any add-on that slows Firefox start-up time by 25% or more. In the upcoming version of Firefox, these warnings will also be displayed in the Add-ons Manager.


Every week, Mozilla will run automated performance tests on the top 100 add-ons hosted in their gallery, and display the results on this page. One of the most popular Firefox add-on, Firebug, slows Firefox start up by 74%. Checkout the list and find out if you use any of the add-ons featured on it. If you do, try to find an alternative that has a lesser impact on the browser.

Mozilla says that soon they will automatically scan new versions of all add-ons as they are submitted, and in the coming months, they will expand this to include other measures, such as page load time. In future versions, Mozilla will also restrict the installation of third party add-ons unless the user explicitly allows it, to prevent developers from sneakily installing toolbars.

[via Mozilla Blog]


  1. but firebug is awesome - i'll take the hit for that


Post a Comment

Popular posts from this blog

How to Record CPU and Memory Usage Over Time in Windows?

Whenever the computer is lagging or some application is taking too long to respond, we usually fire up task manager and look under the Performance tab or under Processes to check on processor utilization or the amount of free memory available. The task manager is ideal for real-time analysis of CPU and memory utilization. It even displays a short history of CPU utilization in the form of a graph. You get a small time-window, about 30 seconds or so, depending on how large the viewing area is.

Diagram 101: Different Types of Diagrams and When To Use Them

Diagrams are a great way to visualize information and convey meaning. The problem is that there’s too many different types of diagrams, so it can be hard to know which ones you should use in any given situation. To help you out, we’ve created this diagram that lays out the 7 most common types of diagrams and when they’re best used:

How to Schedule Changes to Your Facebook Page Cover Photo

Facebook’s current layout, the so called Timeline, features a prominent, large cover photo that some people are using in a lot of different creative ways. Timeline is also available for Facebook Pages that people can use to promote their website or business or event. Although you can change the cover photo as often as you like, it’s meant to be static – something which you design and leave it for at least a few weeks or months like a redesigned website. However, there are times when you may want to change the cover photo frequently and periodically to match event dates or some special promotion that you are running or plan to run. So, here is how you can do that.