I have "increment" and "decrement" bookmarklets, that look for the last-most number in a url and make it go up or down by one. I'm always surprised at how often it's useful. Oh, and I have this one called "kill sticky",
javascript:( function(){ let i, elements = document.querySelectorAll('body *'); for (i = 0; i < elements.length; i++) { if(getComputedStyle(elements[i]).position === 'fixed' || getComputedStyle(elements[i]).position === 'sticky') { elements[i].parentNode.removeChild(elements[i]); } } document.body.style.overflow = "auto"; document.body.style.position = "static"; })()
Which deletes those annoying page-covering popups like "sign up for my newsletter" or "you need to log in (even though the content is right there*)"
I have a slightly longer one that also makes gets rid of the various `overflow:hidden` stylings since it seemed like I'd often kill an annoying popover with the content _right there_ to find that I couldn't scroll down anymore.