Examine source code of Shamrocks2

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#f1f7e8",
      "tab_background_text": "#3d5e07"
    }
  },
  "version": "2.0",
  "name": "Shamrocks2",
  "manifest_version": 2,
  "description": "<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/12ddf77590b5894eac605d36db639a0afed409645e9b193a267ed1ca98e34c36/https%3A//www.youtube.com/watch%3Fv=SjgGzmRhpDg\">https://www.youtube.com/watch?v=SjgGzmRhpDg</a>\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/09e13b012e271590ade63ddcf9c27c5216bbd01be0b9906158879764a6b7a84d/https%3A//www.youtube.com/watch%3Fv=rAMrzvqU2RQ\">https://www.youtube.com/watch?v=rAMrzvqU2RQ</a>\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/75b69c967cd9c11ed9b694ddf1880e6c90e53a1f4ca00efced458397f0d5a0f0/https%3A//www.youtube.com/watch%3Fv=DquA6KyHTos\">https://www.youtube.com/watch?v=DquA6KyHTos</a>\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/14dd6d1b3152e2260330c658c7fabdc36c5a6768186e676a75c0450834f63e2d/https%3A//www.youtube.com/watch%3Fv=lXQ03XUwe_s\">https://www.youtube.com/watch?v=lXQ03XUwe_s</a>"
}