Examine source code of View Commit Message for Bitbucket Server

{
  "name": "View Commit Message for Bitbucket Server",
  "description": "Shows the commit message in a pull request when viewing a single commit.",
  "version": "1.0",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "https://*/projects/*/repos/*/pull-requests/*",
        "https://*/users/*/repos/*/pull-requests/*"
      ],
      "css": [
        "commit.css"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ]
}