Examine source code of Just Save It

{
  "manifest_version": 2,
  "name": "Just Save It",
  "version": "1.0",
  "description": "A simple WebExtension for skipping the \"Save As\" dialog when saving images, pages and links.",
  "author": "Raziel Anarki",
  "homepage_url": "https://github.com/razielanarki/just-save-webextension",
  "icons": {
    "16": "icons/just-save-16.png",
    "24": "icons/just-save-24.png",
    "32": "icons/just-save-32.png",
    "48": "icons/just-save-48.png",
    "64": "icons/just-save-64.png",
    "96": "icons/just-save-96.png",
    "128": "icons/just-save-128.png",
    "256": "icons/just-save-256.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "just-save-it@razielanarki.webextension",
      "strict_min_version": "107.0"
    }
  },
  "background": {
    "scripts": [
      "just-save-it.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "downloads"
  ]
}