Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I'd join you if Apple would ever add support for Gmail's tab system. Mimestream has it on Mac.

Now as for package tracking, the Shop app works quite nicely for that.
Shop has appeared to have fallen into the uberads game now. Home page no longer has orders at top. Has suggested stores, and you have to go another tab to find your orders.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.