The UI works in the same way for all items so we only need to test on one type e.g. localStorage: ``` localStorage.setItem("test","true"); localStorage.removeItem("test"); ``` Historically this has left an item in the table but due to the fixes in bug 1443461 this is no longer the case so we need a test.

Comment on attachment 8957539 [details] Bug 1444106 - Add test for rapid addition and removal of items in the storage inspector https://reviewboard.mozilla.org/r/226418/#review232604 Thanks for the test Mike! Could you use async/await instead of generators and yield? (Note that I'll be on PTO next week, so you would find another reviewer if you have other patches ;)) ::: devtools/client/storage/test/browser_storage_localstorage_rapid_add_remove.js:30 (Diff revision 1) > + yield addRemove("test9"); > + yield addRemove("test10"); > + yield addRemove("test11"); > + yield addRemove("test12"); > + yield addRemove("test13"); > + yield addRemove("test14"); You can use a `for` loop here. ::: devtools/client/storage/test/browser_storage_localstorage_rapid_add_remove.js:38 (Diff revision 1) > +}); > + > +function* addRemove(name) { > + yield ContentTask.spawn(gBrowser.selectedBrowser, {}, () => { > + content.localStorage.setItem("name", "true"); > + content.localStorage.removeItem("name"); You may want to pass `name` instead of `"name"` here. Otherwise you don't use `name` argument.

Pushed by mratcliffe@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/42ab3dc3d93d Add test for rapid addition and removal of items in the storage inspector r=ochameau