web/changelogs: add more historical changelogs

web/changelogs/3.0.md

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+---
+title: "everything what you've been waiting for. welcome to cobalt 3.0 :)"
+date: "Aug 12, 2022"
+---
+
+follow cobalt's twitter account for polls, updates, and more: [@justusecobalt](https://twitter.com/justusecobalt)
+
+stuff that you can notice:
+
+- you can now download audio from any supported service, in any format that you set in settings (+). yes, that includes mp3, which you all have been waiting for :D
+- it's now easier to switch between download modes (just a single toggle on the bottom).
+- your youtube download format has been reset, sorry, but that was required to implement all audio downloads.
+- default download format for youtube videos on all platforms is now webm. except for ios.
+
+- cobalt now has emoji, just to spice up the black and white ui. all of them have been tuned to look the best in both themes. isn't it cool?
+- about, changelog, and donation popups have been merged into just one, for covnenience.
+- changelog got a huge upgrade (as you can see), and now there are both major changes and latest commit info, just so commits can finally go back to being batshit insane.
+- changelog popup appears on every major update, but you can disable it in settings, if you want to.
+- changelog now opens by default when pressing "?" button. i don't think anyone reads "about" as often.
+- settings (+) have been split into three tabs, also for convenience and ease of use.
+
+- added support for donation links. you can now donate through boosty, not only via crypto :D
+- donate popup has been rearranged and tuned just a tiny bit.
+
+- you can now click away from any popup by pressing the void behind it.
+- you can also press "escape" key on keyboard to close any popup.
+
+- switchers and buttons are now way easier on eye. white border is gone from where it's unneeded.
+- buttons are now very satisfying to press.
+- switchers are scrollable if there's not enough space to fit all contents on screen.
+- scaling is now even better than before.
+
+internal stuff:
+
+- frontend won't send video related stuff if audio mode is on.
+- matching has, yet again, gone through mitosis, and is now probably the cleanest it can get.
+- page rendering is now modular, something like what frameworks have but way lighter. this makes adding new features WAY easier.
+- removed some stuff that didn't make sense (like storing language of stream request).
+- cleaned up insides of cobalt, of course.
+- almost all links now open in new tab, just like they should have from the very beginning.
+
+known issues:
+- impossible to download audio from vk. i'll try to fix it in the next update.
+- headers are not sticky in tabbed popups. maybe this is a good thing, i'll think about it.
+
+if you ever notice any issues, make sure to report them on github. your report doesn't have to sound professional, just do your best to describe the issue.