add README

README.md

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+# Miscellaneous topics that I'm too lazy to script
+## Firefox with tree-style tabs
+1. Go to `about:config` in Firefox and make sure all of these are enabled/true:
+```
+toolkit.legacyUserProfileCustomizations.stylesheets
+layers.acceleration.force-enabled
+gfx.webrender.all
+gfx.webrender.enabled
+layout.css.backdrop-filter.enabled
+svg.context-properties.content.enabled
+```
+2. Close Firefox.
+3. Create the file `<firefox profile>/chrome/userChrome.css` in the Firefox
+   profile directory (there may be multiple directories, one will only have one
+   file called `times.json`, this is the wrong one, choose the other one):
+    - Windows: `%AppData%/Mozilla/Firefox/Profiles`
+    - Linux: `~/.mozilla/firefox`
+```
+#TabsToolbar
+{
+        visibility: collapse;
+}
+```
+4. Open Firefox and confirm the top bar is gone. To enable the title bar, go to
+   `Menu -> More Tools -> Customize toolbar...` and check "Title Bar" in the
+   bottom-left corner.