Use chrome.storage.sync instead of Google drive about ublacklist

[verhovsky]

That makes sense why more extensions don't use it. Personally, my blocklist is 2KB (or 599 bytes gzip'd) and I'm too lazy to bother setting up a Google Drive for such a small file, I don't mind recreating it every time I log into Chrome and I would imagine most users of this extensions are the same. Most probably haven't ever looked at the settings page. But I understand, managing 100KB in 8KB chunks and having an option to use Google Drive as well sounds like a lot of work.

[iorate]

As written in that page, chrome.storage.sync has severe limitations, especially in size. The maximum size of one item is only 8,192 bytes. It is too small to store a blacklist for many users.

[iorate]

Another reason why I don't use storage.sync is because it is not available in every Chromium- or Firefox- derivative.
I won't implement sync using storage.sync, but if you like, you can implement it as an option and create pull request.