Examine source code of CPM Auto-fill

{
  "manifest_version": 2,
  "name": "CPM Auto-fill",
  "version": "0.1.5resigned1",
  "description": "Uses Convenient Password Manager to automatically fill in credentials on websites.",
  "icons": {
    "48": "icons/ic_launcher_48.png"
  },
  "browser_action": {
    "default_icon": "icons/ic_launcher_48.png",
    "default_title": "CPM Auto-fill",
    "default_popup": "toolbar/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background_script.js"
    ]
  },
  "permissions": [
    "*://localhost/*",
    "tabs"
  ],
  "applications": {
    "gecko": {
      "id": "cpm_autofill@disco.ethz.ch",
      "strict_min_version": "42.0"
    }
  }
}