I wanted to look at porting it to Firefox, the addons are using very similar APIs these days, so it's not like rewriting everything from scratch. But haven't had time so far.
You can set up a bookmark keyword? E.g. in my Firefox I've got "hyp" for the bookmarklet, then you can press F6 on the page, type "hyp", press enter and it would trigger the bookmarklet!
Using a bookmarklet is inconvenient because I don‘t have bookmarks displayed by default. Screen real estate is valuable.