I thought there was a coding section somewhere but I couldn't find it so it sort of fits here I thought to myself :P
Something I threw together in 5 minutes that I thought I would share.
Sometimes you have loads of spoilers on a page and you just want to open them all if you're looking for something or reading the whole page, right?
(Especially if you have the post count per page to the highest value there's a lot of spoilers per page)
Well I made a bookmarklet that does that. Just make a new bookmark (or edit an old one), and paste this code in the URL text box.
javascript:(function()%7Bvar%20spBody%3Ddocument.getElementsByClassName(%22sp-body%22)%3Bfor(var%20i%3D0%3Bi%3CspBody.length%3Bi%2B%2B)%7BspBody%5Bi%5D.style.display%3D%22block%22%3B%7Dvar%20spHead%3Ddocument.getElementsByClassName(%22sp-head%22)%3Bfor(var%20i%3D0%3Bi%3CspHead.length%3Bi%2B%2B)%7BspHead%5Bi%5D.className%3D%22sp-head%20sp-closed%22%3B%7D%7D)()
So it looks like this in the edit window
Save it, and then whenever you are on a page you can click on the bookmark and it will open all the spoilers on that page.
It's only tested in Chrome on PC, so I can't say how it works in other browsers or mobile devices, but if it works for you then great :)
As a partially unexpected bonus it also works on the Ecchiworld forum as well.
It's not an extension so it cant permanently open every spoiler, just the ones on the page you are on. I will at some point write an MR extension with some other stuff but that's years down the line haha.