Mouse selection of text on a web page cannot be subsequently extended with the keyboard
Using touch, a user can create a selection, and little "grabbers" are rendered allowing the user to expand/contract the selection. However, this post-selection-adjustment feature only works for touch.
When using this mouse, the selection has no "grabbers".
In both cases, the keyboard cannot be used to adjust the selection. If, instead, I use Firefox or Chrome, the selection can be adjusted by using the keyboard "SHIFT" + arrow keys, to adjust the active selection.
Please bring this functionality to Microsoft Edge. It will also help with selection keyboard accessibility.