Change Tumblr Font to Literally Anything Else

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Change Tumblr Font to Literally Anything Else",
  "short_name": "tumblr font",
  "version": "1.4.6",
  "author": "9999yea.rs",
  "description": "Removes every trace of Gibson from Tumblr.",
  "icons": {
    "16": "icon_16.png",
    "32": "icon_32.png",
    "48": "icon_48.png",
    "128": "icon_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.tumblr.com/*",
        "*://tumblr.com/*"
      ],
      "css": [
        "blank.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "apercu/*",
    "domaine/*"
  ],
  "offline_enabled": true
}