Your extension maker doesn’t seem to work for me, but I’ve found another solution to your problem that can be interesting for other people:
The Powerlet extension for Chrome (I use it on Brave), groups all your Bookmarklets under a single button on the extensions bar. So you save screen real estate and it only takes two clicks to run any bookmarklet. Also, the icon and pane look straightforward and cool:
With this thing and short names, I can use 4 bookmarklets on desktop and mobile with minimum hassle. I hope you people find it useful.