Tabs that are opened from a pinned one are opened at the far left of the tab bar. This gets problematic if you use a large amount of tabs because you start to jump from the left to the right end of your tab bar. Normally new tabs are opened on the right end - this add-on ensures that tabs from a pinned tab are opened on the right end, too.
If you experience any issues, please let me know here.
Known Issues: Due to limitations in the implementation of Add-on in Firefox you may see the tabbar scrolling from left to right. Depending on your settings you may also see the current page flashing.
