Examine source code of smart speed tweaks

{
  "manifest_version": 2,
  "name": "Speed Tweaks",
  "version": "1.0",
  "description": "Apply browser speed tweaks like disabling animations and heavy features.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Speed Tweaks"
  },
  "permissions": [
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{50cfff0b-c3e5-43bf-a99d-156a03f9c231}"
    }
  }
}