file_set_storages.html

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<html>

  <head>

    <meta charset="UTF-8">

    <title>Bug 1238183</title>

  </head>

  <body>

    <script type="application/javascript">

      "use strict";

      // if we have a query string, use it to set storages

      if (window.location.search.length) {

        let context_name = window.location.search.substr(1);

        localStorage.setItem("userContext", context_name);

        sessionStorage.setItem("userContext", context_name);

        let request = indexedDB.open("idb", 1);

        request.onerror = function() {

          throw new Error("error opening db connection");

};

        request.onupgradeneeded = event => {

          let db = event.target.result;

          let store = db.createObjectStore("obj", { keyPath: "id" });

          store.createIndex("userContext", "userContext", { unique: false });

};

        request.onsuccess = () => {

          let db = request.result;

          let transaction = db.transaction(["obj"], "readwrite");

          let store = transaction.objectStore("obj");

          store.add({id: 1, userContext: context_name});

          transaction.oncomplete = () => {

            db.close();

};

};

    </script>

  </body>

</html>