I use it all the time for bookmarklets and userscripts when I want to customize a page that I can't modify directly. Vendor site showing too many out of stock i

I use it all the time for bookmarklets and userscripts when I want to customize a page that I can't modify directly. Vendor site showing too many out of stock items? querySelectorAll('div.out-of-stock') and wipe them all out. Filter options not good enough? querySelectorAll('div.price').forEach( /* delete products between x and y prices */ ).