Firefox reveals the slowest browser add-onsUp to 74% slower load times

05 April 2011

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Firefox has shared which add-ons slow the browser's load times the most when they're installed.

The browser, which has come in for criticism in the past for its speed, has tackled what many believe to be the source of problem – complex, or badly designed, browser add-ons.

The worst offenders are FoxLingo (a webpage translator and dictionary) and Firebug (a tool set for web developers), each of which slowed the browser's start-up time by an astonishing 74%.

Other defendants include FlashGot and Video DownloadHelper, both of which allow users to download flash videos from video websites like YouTube. 

Remarkably, five of the top 10 slowest starting add-ons are among the top 20 most popular add-ons for Firefox. No wonder so many users have complained over the years.

Thinking of switching browsers? Here's our list of best new features of Internet Explore 9.

When faster isn't faster at all

A special mention must go to FastestFox, however. As the name suggests it's designed to help you browse faster by pre-fetching web pages, but at 33% slower it sneaks in as the 8th slowest starting add-on. Oh dear.

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