In the main menu, there is the eyedropper in "More Tool" to get the value of a color 👍

The ability to send tabs across devices is now stable if the 2 devices are connected with the same Firefox account.

About searches:

• % to search accross tabs
• ^ to search in the history
• * to search through the bookmarks

And the screenshots. The OS often provides tools and shortcuts, but Firefox provide a way to target HTML Nodes 👍 (shortcut: ^S)