manifest.json

{
  "manifest_version": 2,
  "name": "List Layouts for Trello",
  "description": "Allow Trello lists to be displayed vertically or in a grid.",
  "version": "3.2",
  "author": "Natalie Chouinard",
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "content_scripts": [{
    "matches": ["*://trello.com/b/*"],
    "css": ["css/layout.css"],
    "js": ["js/init.js"]
  }],
  "permissions": [
    "*://trello.com/b/*",
    "declarativeContent",
    "storage",
    "webNavigation"
  ],
  "page_action": {
    "default_title": "List Layouts for Trello"
  },
  "commands": {
    "_execute_page_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+L",
        "mac": "MacCtrl+Shift+L"
      }
    }
  }
}