Just another app that thinks that a few registry tweaks will make all the difference, following the lead of all the other "Windows Optimizer" apps beforehand.
There's no unique value proposition here that I can see.
Likewise, the Save to Watch Later button is also missing from lite-youtube-embed, which is a feature I use a lot.
Yes, you can get to it by playing the video, but that defeats the point. I don't want to play the video, I don't want to wait for the video to load only to pause it and click the Save to Watch Later button.
One approach is to copy the data to a location that you control first (eg: RAM) and perform both the check and the use of that data from the trusted location. That can be difficult though on embedded devices with constrained resources.
A number of the Gmail features are unique to the web app, not standard email filters so while Mail.app will get you the core features you'll still need the ability to run the web app from time to time (eg: updating mail filters)
I don't get why WebSession proposes to use authentication headers like WWW-Authenticate, when it calls out at the start that it's not a replacement for authentication protocols. If that's the case, surely it should just be using it's own headers to avoid confusion.
There's no unique value proposition here that I can see.