manifest.json

{
  "name": "Tumblr personal post highlighter",
  "author": "Luis Rojas <lluisrojass@gmail.com>",
  "manifest_version": 2,
  "version": "1.1.0",
  "description": "Highlight a blog's uploaded posts",
  "permissions": [
    "declarativeContent",
    "storage"
  ],
  "page_action": {
    "default_tooltip": "Personal Post Highlighter for Tumblr",
    "default_icon": {
      "16": "icons/off/16x16.png",
      "32": "icons/off/32x32.png",
      "48": "icons/off/48x48.png",
      "128": "icons/off/128x128.png"
    }
  },
  "icons": {
    "16": "icons/off/16x16.png",
    "32": "icons/off/32x32.png",
    "48": "icons/off/48x48.png",
    "128": "icons/off/128x128.png"
  },
  "content_scripts": [
    {
      "matches": ["*://*.tumblr.com/archive*"],
      "js": ["lib/content.bundle.js"],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "lib/ui.background.bundle.js",
      "lib/installer.background.bundle.js"
    ],
    "persist": false
  }
}