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Firefox 113.0.1 Excessive memory usage & CPU Utilization at almost 90%+


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Recent updates to Firefox has created a memory usage issue where memory in use goes from 200-400MB to 2-4GB opening 1, 2 or 3 YouTube tabs, plus protopage and a bugzilla page. Once the memory usage goes up, loading any web page tab goes from 0-5 seconds to 30-60-90 seconds or more to just load the page and then there is continuous stuttering due to massive memory usage.

I submitted an issue to Bugzilla but also started diagnosing extensions. It appears that the Malwarebytes extension is the culprit. I disabled all my extensions and re-enabled one by one and the problem started as soon as I enabled the MB extension.  I've done a factory reset but it doesn't seem to have much of an effect. I've had to disable the extension for now but it's not something I really want to do but I don't see any other way.

I use desktop and portable versions of FF and the issue exists on both installations. So, it is repeatable across installations.

Memory Usage.jpg

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  • Root Admin

Along with the Debug log can you also get us logs for the PC


To begin, please do the following so that we may take a closer look at your installation for troubleshooting:

NOTE: The tools and the information obtained are safe and not harmful to your privacy or your computer, please allow the programs to run if blocked by your system.

  • Download the Malwarebytes Support Tool
  • In your Downloads folder, open the mb-support-x.x.x.xxx.exe file
  • In the User Account Control pop-up window, click Yes to continue the installation
  • Run the MBST Support Tool
  • In the left navigation pane of the Malwarebytes Support Tool, click Advanced
  • In the Advanced Options, click Gather Logs. A status diagram displays the tool is Getting logs from your machine
  • A zip file named mbst-grab-results.zip will be saved to the Public desktop, please upload that file on your next reply

Thank you


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