#bookmarklets

This is an interesting question, what do you need to do specifically? Because a lot of solutions could be found. A button can only be added by a userscript (not a skin), which means not working on mobile (and I have no knowledge of one).

But like, if you need one skin on mobile and one skin on desktop that can be done by making one skin parent of the other and then one of the two having the option Media: 'only screen and (max-width: 42em)'. There is going to be some overlap so a few things might not work very well but that depends on what you want to do.

But also there's the option of adding ?site_skin=929 at the end of the page url and that will change the skin automatically.

929 is the id of reversi (the dark mode skin) but you can find the id of your own skin by going to edit it and look at the url:

( http://archiveblablabla/skins/894085/edit you won't be able to reach this number in particular because that's one of my private skins, you'll get an error 'you don't have permissions' but that's where the id is found)

and with that in mind you can make a bookmarklet that adds the code ?site_skin=929 to any url (to install a bookmarklet you should google 'how to install a bookmarklet' + your browser because every one is different, it will work with mobile too! riesling explains how pretty well in their own bookmarklet (that does a completely different but still very useful thing here)

the code of the bookmarklet is here: https://raw.githubusercontent.com/electricalice/Ao3-bookmarklets/main/changeskin.min.js

and you can change the skin id at the beginning where it says let skin = 929; change the 929 in your id

Userscripts:

I use these with Greasemonkey in Firefox, but other browsers have their own monkey-based extensions for userscripts. AO3 Kudos/Hits Ratio — Min's script does the math for you so you can see how popular a work is with its readers. Shown as a percentage, the ratio is useful as long as you're aware of its shortcomings. For instance, chaptered wips are always going to have a really low kudos/hit ratio just because a reader can only leave kudos once but usually visits a story multiple times, driving up the hit count. And of course it doesn't take comments into account. Incomplete Work Script — Makes it more obvious a work is in progress by greying out the text and changing the transparency of the blurb. Works on index pages as well as on the work itself. Never again Rarely get to the end of a story and experience that sinking realization that it's not finished! This is by @flamebyrd​, who makes a lot of the tools I use. Download Buttons — Want to download a lot of stuff in a hurry? tuff_ghost's script adds a download button next to each work on an index page. So go ahead and download the top ten coffee shop AUs without ever leaving the page. Works on series pages, too. Floaty Review Box, Chapter Shortcut & Kudos Sortable Bookmarks — @ravenel​'s script does lots of good things. The floaty review box makes commenting easier, just highlight favorite lines, hit "insert" and the magic box copies them to the comment box for later. The last chapter shortcut is helpful if a wip has just been updated and you want to skip straight to the latest chapter. And, as if that weren't enough, it also lets you sort your bookmarks by kudos. If you can, check out the Tumblr post for a gif-based tutorial. If you can't, get the userscript directly from pastebin.

Other Helpful Tools:

they are like little userscripts you can activate from ur bookmark bar without like needing to even download amything

I’m seeing a lot of news stories in my Google Alerts about Twitter cutting off access to people who aren’t logged in. According to The Verge, if you’re not logged in to Twitter you can’t see tweets or profiles or much of anything. (Access to Twitter search was cut off earlier, in April.) If you don’t have access to Twitter but you need to access Twitter profile data or tweets, I have a couple of…

You can create bookmarklet: