fix(firefox): firing with custom Object become restrictions data

communicate with plain json string instead of custom Object
more: https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent

re #25

src/extension/injected-script/addEventListener.ts

@@ -46,8 +46,9 @@ export interface CustomEvents {
     }
     ;(Object.keys(hacks) as (keyof DocumentEventMap)[]).concat(['keyup', 'input']).forEach(hijack)
     const invokeCustomEvent: EventListenerOrEventListenerObject = e => {
-        const ev = e as CustomEvent<[keyof CustomEvents, CustomEvents[keyof CustomEvents]]>
-        const [eventName, param] = ev.detail
+        const ev = e as CustomEvent<string>
+        const [eventName, param]: [keyof CustomEvents, CustomEvents[keyof CustomEvents]] = JSON.parse(ev.detail)
+
         for (const f of store[eventName] || []) {
             try {
                 const hack = hacks[eventName]

src/utils/utils.ts

@@ -20,7 +20,7 @@ export function getUrl(path: string, fallback: string = '') {
  * @param x parameters
  */
 export function dispatchCustomEvents<T extends keyof CustomEvents>(event: T, ...x: CustomEvents[T]) {
-    document.dispatchEvent(new CustomEvent(CustomEventId, { detail: [event, x] }))
+    document.dispatchEvent(new CustomEvent(CustomEventId, { detail: JSON.stringify([event, x]) }))
 }
 Object.assign(window, { dispatchCustomEvents })
 /**