message: browser/README: document InstrumentationOptions
  Fixes
  (missing doc for instrumentation options (onerror in particular))
diff: @@ -221,6 +221,8 @@ more info:
  ### Instrumentation
  +#### console
  +
  `@airbrake/browser` automatically instruments `console.log` function calls in
  order to collect logs and send them with the first error. You can disable that
  behavior using the `instrumentation` option:
  @@ -234,6 +236,62 @@ const airbrake = new Notifier({
  });
  ```
  +#### fetch
  +
  +Instruments [`fetch`][fetch] calls and sends performance statistics to Airbrake.
  +You can disable that behavior using the `instrumentation` option:
  +
  +```js
  +const airbrake = new Notifier({
  + // ...
  + instrumentation: {
  + fetch: false,
  + },
  +});
  +```
  +
  +#### onerror
  +
  +Reports the errors occurring in the Window's [error event][onerror]. You can
  +disable that behavior using the `instrumentation` option:
  +
  +```js
  +const airbrake = new Notifier({
  + // ...
  + instrumentation: {
  + onerror: false,
  + },
  +});
  +```
  +
  +#### history
  +
  +Records the history of events that led to the error and sends it to Airbrake.
  +You can disable that behavior using the `instrumentation` option:
  +
  +```js
  +const airbrake = new Notifier({
  + // ...
  + instrumentation: {
  + history: false,
  + },
  +});
  +```
  +
  +#### xhr
  +
  +Instruments [XMLHttpRequest][xhr] requests and sends performance statistics to
  +Airbrake. You can disable that behavior using the `instrumentation` option:
  +
  +```js
  +const airbrake = new Notifier({
  + // ...
  + instrumentation: {
  + xhr: false,
  + },
  +});
  +```
  +
  ### APM
  #### Routes
  @@ -293,3 +351,6 @@ this.airbrake.queues.notify(queueInfo);
  ```
  [project-idkey]: https://s3.amazonaws.com/airbrake-github-assets/airbrake-js/project-id-key.png
  +[fetch]: https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch
  +[onerror]: https://developer.mozilla.org/en-US/docs/Web/API/Window/error_event
  +[xhr]: https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest
  