For the few I have on FF Android, create the bookmarklet as normal, give it a name, and also give it a "keyword" string.
Then, when you want to execute a bookmarklet on the current page, pull down to get to the URL bar (if it is hidden) and start typing the "keyword" string into the url bar. After a few characters the "suggestions" list should show the bookmarklet entry, when it does, tap on the entry and the bookmarklet will execute on the current page.
I've not been able to find a way to "open" a list of bookmarklets to pick from, other than using keyword search via the URL bar, so this does also require remembering the "keywords" for each to be able to access them.
Then, when you want to execute a bookmarklet on the current page, pull down to get to the URL bar (if it is hidden) and start typing the "keyword" string into the url bar. After a few characters the "suggestions" list should show the bookmarklet entry, when it does, tap on the entry and the bookmarklet will execute on the current page.
I've not been able to find a way to "open" a list of bookmarklets to pick from, other than using keyword search via the URL bar, so this does also require remembering the "keywords" for each to be able to access them.