Bug 1560261 - disable browser_webconsole_warning_groups_filtering.js on windows 7 opt for frequent failures. r=jmaher

Differential Revision: https://phabricator.services.mozilla.com/D38091

--HG--
extra : moz-landing-system : lando

devtools/client/webconsole/test/mochitest/browser.ini

@@ -449,6 +449,7 @@ tags = trackingprotection
 [browser_webconsole_warning_group_content_blocking.js]
 skip-if = fission
 [browser_webconsole_warning_groups_filtering.js]
+skip-if = (os == "win" && bits == 32) && !debug # Bug 1560261
 [browser_webconsole_warning_group_multiples.js]
 [browser_webconsole_warning_groups_outside_console_group.js]
 [browser_webconsole_warning_groups_toggle.js]