manifest.json

{
  "description": "Generate a link to a selection",
  "manifest_version": 2,
  "name": "Selection",
  "version": "1.0",

  "homepage_url": "https://github.com/Focus4you/Selection",

  "applications": {
    "gecko": {
      "id": "Selection@Focus4you.github",
      "strict_min_version": "57.0a1"
    }
  },
  
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "tabs",
    "<all_urls>",
    "*://*/*"
  ],

  "background": {
    "scripts": ["scripts/background.js"]
  },

    "content_scripts": [
      {
        "matches": ["*://*/*"],
        "js": ["scripts/content.js"]
      }
    ],

    "browser_action": {
        "browser_style": true,
        "default_icon": "buttons/show_images_show_videos.svg",
        "default_title": "Link to Selection. New tabs.",
        "default_popup": "popup.html?type=default"
    },

    "page_action": {
      "browser_style": true,
      "default_icon": "buttons/show_images_show_videos.svg",
      "default_title": "Link to Selection. Current tab.", 
      "default_popup": "popup.html?type=tab",
      "show_matches": ["*://*/*"]
    },

    "icons": {
          "48": "buttons/show_images_show_videos.svg",
          "96": "buttons/show_images_show_videos.svg"
      },

    "author": "Peter Kehl"
}