browser_thumbnails_bg_no_alert.js

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/* Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/publicdomain/zero/1.0/ */

add_task(async function thumbnails_bg_no_alert() {

  let url =

    "data:text/html,<script>try { alert('yo!'); } catch (e) {}</script>";

  ok(!thumbnailExists(url), "Thumbnail file should not already exist.");

  let [capturedURL] = await bgCapture(url);

  is(capturedURL, url, "Captured URL should be URL passed to capture.");

ok(

    thumbnailExists(url),

    "Thumbnail file should exist even though it alerted."

);

  removeThumbnail(url);

});