When I downloaded Firefox Focus after release, I was very happy to find that LocalStorage is supported, unlike every other private mode browsing on iOS I'd seen prior (Mobile Safari, Chrome, Firefox, etc). Unfortunately after updating recently from the App Store, it is also now unsupported in Firefox Focus too.
// Disable localStorage.
// We clear the Caches directory after each Erase, but WebKit apparently maintains
// localStorage in-memory (bug 1319208), so we just disable it altogether.
There are a lot of legitimate reasons for a website to use web storage, and it is by no means incompatible with "privacy", as long as it's cleared at the end of the private session. Is this an insurmountable problem to overcome without a fix from Apple?