Added proper alert messages and improved security of import file.

src/scripts/background.js

@@ -1,33 +0,0 @@
-let processor = (obj, name) => {
-    let data = obj.target.result;
-    let enteryName = prompt("What is this session's name?", "" + name);
-    console.log(name);
-    if (enteryName) {
-        browser.storage.local.set({[enteryName]: data});
-    }
-};
-
-document.getElementById("inputId").onchange = (e) => {
-    let size = e.target.files.length;
-    let fileArry = e.target.files;
-
-    for (var i = 0; i < size; i++) {
-        let reader = new FileReader();
-        let name   = fileArry[i].name;
-        name = name.split(".")[0];
-
-        reader.onloadend = (obj) => { processor(obj, name); };
-
-        if (fileArry[i].type == "application/json")
-            reader.readAsText(fileArry[i], {encoding: "string"});
-    }
-};
-
-
-document.addEventListener("click", (e) => {
-    if (e.button == 0) {  // Left click
-        if (e.target.className == "container") {
-            document.getElementById("inputId").click();
-        }
-    }
-});