Mixmax Button Shrinker

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Mixmax Button Shrinker",
  "description": "Shrinks Mixmax buttons down to an icon (Inbox by Gmail)",
  "version": "3.5",
  "icons": {
    "128": "icon128.png"
  },
  "permissions": [
    "activeTab",
    "https://inbox.google.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://inbox.google.com/*"
      ],
      "css": [
        "mm.css"
      ],
      "js": [
        "mm.js"
      ],
      "run_at": "document_end"
    }
  ]
}