重新加载扩展程序后，Chrome.storage.sync被覆盖

Question

I have a chrome extension which creates context menus with data gotten from an array stored in the chrome.storage. This array is updated in the options.html page.

The context menu creator works fine, but when I open the options page and try to insert a new value into the array after reloading the extension it gets overwritten, losing the previous values. ¿Is there any solution? Edit 1 For clarification. The storage is kept, but when I try to push something into the array, it overwrites the whole array.

Edit2
Options.html

function save_options() {
    var id = document.getElementById('id').value;
    ids.push(id);

    chrome.storage.sync.set({
        'movieId': ids
    }, function() {
        // Feedback
        var status = document.getElementById('status');
        status.textContent = 'Options saved.';
        setTimeout(function() {
            status.textContent = '';
        }, 750);
    });
    createRow(1);
}

That is the code I use to upgrading the array.

Answer 1

As @BenjaminGruenbaum said, I was doing var ids = [] erasing the previous stored data. Just by erasing it, the code worked.