It is already installed and taking up space on my computer and you can not uninstall it.
It is simple, and uncluttered.
I can put Popup Manager on it and block popups with a smaller footprint than Mozilla.
It is free.
It is a/the target browser of the majority of websites.
I can put all the toolbar buttons, the menu, and the address bar on a single row.
1. Although rare, it does crash.
2. When one browser window crashes, the crash takes all the windows with it.