manifest.json

{
  "browser_action": {
    "browser_style": true,
    "default_title": "B&W filter",
    "default_icon": {
      "19": "icons/icon-19.png",
      "38": "icons/icon-38.png"
    }
  },
  "background": { "scripts": ["scripts/background_script.js"] },
  "content_scripts": [
    {
      "matches": [ "<all_urls>" ],
      "js": [ "scripts/content_script.js" ]
    }
  ],
  "description": "Firefox Gray scale filter",
  "homepage_url": "https://github.com/MaximPerry/Firefox-GrayScaleFilter",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "manifest_version": 2,
  "name": "SlashOn BW filter",
  "options_ui": {
    "page": "settingsUI/settings.html",
    "browser_style": true
  },
  "permissions": [
    "<all_urls>",
    "notifications",
    "storage",
    "activeTab"
  ],
  "version": "1.4.1",
  "author": "Maxim Perry",
  "web_accessible_resources": [
    "icons/*.png",
    "*.html",
    "*.js"
  ]
}