YOOO made by wiiuavi, check it out
here.
To del a bookmark, just select the slot and save (empty) bookmark. You can also save images alone (if u wanna get your hotbar lineup).
To get a better background, clone the repo, change the image background1.png.
Same with the armour.
Hit E or escape to exit this.
If you havent alrdy, go to chrome >> startup, open selected tabs on startup >> "path to index.html file of your cloned repo".
To get a favicon easily (if you want to enchant) go to the site, right click anywhere to view page source, find {rel="icon"} and find the href link following it.