Revert StackExchange Formatting

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Revert StackExchange Formatting",
  "version": "0.9.5",
  "manifest_version": 2,
  "homepage_url": "https://github.com/Prid13/Revert-StackExchange-Formatting",
  "description": "Brings back the old line height, fonts, colors, etc. on StackExchange websites like StackOverflow.",
  "icons": {
    "16": "icons/favicon-16x16.png",
    "32": "icons/favicon-32x32.png",
    "48": "icons/favicon-48x48.png",
    "128": "icons/favicon-128x128.png"
  },
  "browser_action": {
    "default_icon": "icons/favicon-19x19.png",
    "default_title": "StackExchange - Custom Formatting",
    "default_popup": "src/browser_action/browser_action.html"
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.stackoverflow.com/*",
        "*://*.serverfault.com/*",
        "*://*.superuser.com/*",
        "*://*.stackexchange.com/*",
        "*://*.askubuntu.com/*",
        "*://*.stackapps.com/*",
        "*://*.mathoverflow.net/*"
      ],
      "run_at": "document_start",
      "js": [
        "src/inject/custom_css.js"
      ]
    }
  ]
}