I like the webclipper a lot. A feature that I miss is, to be able to set some default tags. I am suggesting 2 options:
Fixed / default tag
Add an option/setting in the clipper to always add a fixed tag to pages. This could, for example, be useful to be able to find back clipped pages later. I would always add the tag
from:clipper, where I also use
from:pocket etc. If the extension options would include one or more tags, those should alway be added to the clipped page. Always added, or as defaults, so the user can delete them case by case.
Another option in the extension settings could be a checkbox to remember the last used tags. If checked, the tags of the previous clipping would be presented as defaults. This is useful if you are researching a topic, and like to add the same tag to a group of pages again and again. The checkbox might also be in the clipping window, to be able to easily toggle.