Bug 1552288 - disable browser_toggleTransparentOverlay-1.js on Linux_64_QR for frequent failures. r=intermittent-reviewers,jmaher DONTBUILD

Differential Revision: https://phabricator.services.mozilla.com/D122961

toolkit/components/pictureinpicture/tests/browser.ini

@@ -98,6 +98,8 @@ skip-if = os == "linux" && bits == 64 # Bug 1605565
 [browser_toggleSimple.js]
 skip-if = os == 'linux' # Bug 1546455
 [browser_toggleTransparentOverlay-1.js]
+skip-if =
+  os == 'linux' && bits == 64 && webrender # Bug 1552288
 [browser_toggleTransparentOverlay-2.js]
 skip-if = os == 'linux' && (debug || asan) # Bug 1546930
 [browser_videoSelection.js]