Most browsers have a feature called “Pin Tab” which basically shrinks the tab down the the favicon. This feature has always been completely pointless to me, because really, what is the use of pinning a tab every time I open my browser?
Enter Auto-Pin URL, a Chrome Extension.
Just enter the sites that you’d like to have auto-pin, and it does the work. This actually turns out to be pretty handy for sites you regularly have open. It even supports things like chrome://bookmarks.