Examine source code of Slope Calculator

{
  "name": "Slope Calculator",
  "description": "Slope calculator finds the slope of the line by using two points & line equation method. Slope finder gives the result of slope with steps along with other values",
  "version": "1.0.0",
  "manifest_version": 2,
  "browser_action": {
    "default_title": "Slope Calculator",
    "default_popup": "index.html",
    "default_icon": {
      "16": "assets/16x16.png"
    }
  },
  "icons": {
    "16": "assets/16x16.png",
    "32": "assets/32x32.png",
    "48": "assets/48x48.png",
    "64": "assets/64x64.png",
    "128": "assets/128x128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ea8d67f1-cc79-4645-8622-e9043ac92fda}"
    }
  }
}