Performance of a browser is affected by a lot of things. Browsers are getting more and more complex, and the options of customization are growing exponentially. That's why we need to be careful when choosing what extensions or add-ons to install.If you have a lot of extensions installed, you may experience performance issues, especially with older computers. Especially if there are extensions running in the background without your knowledge. This is why it's good to periodically check your browser extensions and make sure they're still needed or that they don't cause any issues.