Bug 1794904 - disable browser_jsonview_expand_collapse.js on Linux_64_opt for frequent failures. r=intermittent-reviewers,MasterWayZ

Differential Revision: https://phabricator.services.mozilla.com/D159969

devtools/client/jsonview/test/browser.ini

@@ -53,3 +53,5 @@ support-files =
 [browser_jsonview_url_linkification.js]
 [browser_jsonview_valid_json.js]
 [browser_jsonview_expand_collapse.js]
+skip-if =
+  os == 'linux' && bits == 64 && !debug # Bug 1794904