Install Ublock: Here
Click on the extension and click the gears for settings
Scroll to the bottom, click "I am an advanced user" and then click the new gears that pop up.
Find userRecourcesLocation, and change its value from "unset" to "https://pastebin.com/raw/PPZ1T7uh"
Go back to normal settings and fins the "Custom filters" tab
Add "*##+js(execute_script.js)" to the filters and apply
Now you can press "ctrl + ~" to open a JS popup, paste bookmarklets here.