How removing zen browser padding and margin

how-removing-zen-browser-padding-and-margin.txt

1. Navigate to `about:config`.
2. Search for `toolkit.legacyUserProfileCustomizations.stylesheets` and toggle it to `true` (by double-clicking on it).
3. Find the Zen profile folder.
4. Inside the Zen profile folder, create a new folder named `chrome`.
5. Inside the `chrome` folder, create two new files: `userContent.css` and `userChrome.css`.
6. Open `userChrome.css` using a text editor and paste the following code:

```css
  :root:not([inDOMFullscreen="true"]) #tabbrowser-tabbox #tabbrowser-tabpanels .browserSidebarContainer {
  border-radius: unset!important;
  margin: unset!important;
  padding: 0px !important;
}

:root:not([inDOMFullscreen="true"]) #tabbrowser-tabbox #tabbrowser-tabpanels[zen-split-view="true"] .browserSidebarContainer {
  margin: unset!important;
  padding: unset!important;
}

#tabbrowser-tabpanels > hbox {
  margin: 0px!important;
  padding: 0px!important;
} 

@media (-moz-bool-pref: "zen.view.compact") {
	#tabbrowser-tabpanels:not([zen-split-view]) {
		--zen-webview-border-radius: 0 0 0 0;
		--zen-element-separation: 0;
	}
}
   ```
7. Open Inspector Element Tools > Advanced Settings > check:
  - Enable browser chrome and add-on debugging toolboxes.
8. Restart the browser!


References:
- https://www.reddit.com/r/browsers/comments/1erv3mv/any_way_to_remove_border_from_zen_browser/
- https://github.com/zen-browser/desktop/discussions/233
- https://old.reddit.com/r/FirefoxCSS/wiki/index/tutorials#wiki_setup