Error in local storage - NS_ERROR_FILE_CORRUPTED - firefox

Question

I\'ve been working in a web application and I\'m using local storage. But for some Firefox users I notice that they\'re having the following error:

NS

Answer 1

This is a browser-level error: you probably didn't do anything wrong to cause this error. The browser (or the the SQLite library it uses) either did something wrong, or the file was left in an invalid state due to a hardware problem.

You can't really prevent this issue, except by joining the Firefox development team and making the browser's storage system more fault-resistant. There doesn't seem to be any way to restore data from this error, so what you'll have to do is detect this error and tell users how to blow away their browser storage according to this MDN post:

try {
    setLocalStorageItem(key, value);
} catch(e) {
    if(e.name == "NS_ERROR_FILE_CORRUPTED") {
        showMessageSomehow("Sorry, it looks like your browser storage has been corrupted. Please clear your storage by going to Tools -> Clear Recent History -> Cookies and set time range to 'Everything'. This will remove the corrupted browser storage across all sites.");
    }
}

Note that the catch block should verify that the error is an NS_ERROR_FILE_CORRUPTED error. I think my check on e.name is correct, but you should verify it for yourself.