Examine source code of AlwaysKillSticky

{
  "manifest_version": 2,
  "name": "AlwaysKillSticky",
  "version": "1.3.4",
  "description": "Get rid of sticky elements on websites - permanently!",
  "author": "Said Achmiz",
  "browser_specific_settings": {
    "gecko": {
      "id": "AlwaysKillSticky@saidachmiz.net",
      "strict_min_version": "57.0"
    }
  },
  "homepage_url": "https://git.sr.ht/~achmizs/AlwaysKillSticky.git",
  "permissions": [
    "activeTab",
    "storage",
    "unlimitedStorage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_start",
      "js": [
        "functions.js",
        "contentScript.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "AlwaysKillSticky",
    "default_icon": {
      "19": "images/AKS_off_19.png",
      "38": "images/AKS_off_38.png"
    }
  },
  "icons": {
    "48": "images/AKS_on_48.png",
    "96": "images/AKS_on_96.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  }
}