Roblox Mutual Friends Plugin 作者： Andrew

View the mutual friends on someone else's profile. Useful to see if someone knows someone else on your friend's list.

You can contribute here:
https://github.com/fuzzydragon/Roblox-Mutual-Friends-Plugin

If you don't want to use the extension on the Firefox Add-ons store then consider downloading the project from it's Github repository and then installing the extension manually.

https://github.com/fuzzydragon/Roblox-Mutual-Friends-Plugin