
Some toolbars and add-ons are even considered PUPs or adware.

This can can slow down browser start-up and page loading time, clutter the interface with toolbars, and they may fall behind on version compatibility and security updates. Further, it is not uncommon for third-party applications to install bundled add-ons into browsers as part of their own installation process. Incompatible browser extensions and add-ons can also impact system performance and cause compatibility issues such as application hangs (freezing). Sometimes they cause browsers to quit unexpectedly or not perform properly especially, if it was poorly designed or was created for an earlier browser version. Too many toolbars, BHOs, extensions and add-ons/plug-ins attached your browser can contribute to poor performance, slow loading and other issues. Alternatively you can download and run CCleaner which removes unused, temporary and junk files from your system to include temporary Internet files, cookies, erases private data in browser history, etc. Clearing the cache forces the browser to load the latest versions of Web pages and programs you visit. As you browse web pages, the browser stores a copy of the pages you view on your local hard drive this is called caching. Try clearing your web browser cache, search and recent history. Sometimes just closing and restarting the browser will improve its performance. A browser has a natural tendency to slow down and exhibit various issues the longer it has been open. What works for one person may not work for another.

A slow browser is a common complaint with various causes and possible solutions.
