message: move store to extension commands
diff: @@ -19,6 +19,7 @@ import browser from "webextension-polyfill";
  import parser from "ua-parser-js";
  import { recorder } from "./editor";
  import Debugger from "../debugger";
  +import variables from "../../stores/view/Variables";
  const parsedUA = parser(window.navigator.userAgent);
  @@ -267,6 +268,11 @@ export default class ExtCommand {
  }
  }
  + doStore(string, varName) {
  + variables.addVariable(varName, string);
  + return Promise.resolve();
  + }
  +
  wait(...properties) {
  if (!properties.length)
  return Promise.reject("No arguments");
  @@ -361,6 +367,7 @@ export function isExtCommand(command) {
  case "selectFrame":
  case "selectWindow":
  case "setSpeed":
  + case "store":
  case "close":
  return true;
  default:
  