- Do I actually need it? For example, I like the gnome ArcMenu extension but I don’t really need it, so no to that one.
- Read the reviews and/or ask in the relevant community, or a Privacy community like this one.
- If the code’s up to date in a repo see where (if anywhere) its phoning home to.
- If its not but I still really need it, install it, then run Wireshark and see what its up to, if anything.