The other piece I need to really get the most out of these bookmarklets is xBrowserSync. Now all of my bookmarks and bookmarklets sync among all of the browsers I may use. Unfortunately they don’t have an extension out for Vivaldi yet, but they do have a beta extension available that works for Brave.
You can check out my list of bookmarklets here. If you have a favorite, drop me an email so I can add it!