Google-chrome – How to actually change HTML5 localStorage size in browsers

No (official) information exists yet for HTML5, but I suppose that if the default player is changed in the browser, then HTML5 will use it as well. Below are some sources for installing the VLC plugin in various browsers and OS.

The "The Mozilla plugin" section in the Videolan manual, Chapter 4. Advanced use of VLC, explains the process for Windows/Firefox and OSX/Safari.

For Linux/Firefox see Howto: Firefox Install Multimedia Player VLC with plug-in.

Chrome provides the ability to block HTML5 LocalStorage as part of its cookie-blocking functionality. Since both technologies ultimately allow websites to store and retrieve data on end-user devices it makes sense to manage them in the same way.

Just click the Menu icon and choose Options (or Preferences on UNIX-like platforms), click Show advanced settings..., select Content Settings, and choose the Block any sites from setting data option:

While you're there, you can select Manage Exceptions to whitelist certain sites, or All Cookies and Site Data to manage or delete existing data.

Now when you visit a site, a small icon will appear indicating cookies or LocalStorage has been blocked:

If you click on that, choose Show cookies and other site data, and select the Blocked tab, you can see what data the site tried to save and whitelist sites on a temporary or permanent basis.

The Chrome authors are not big fans of fiddly knobs, so they're unlikely to add ones to disable individual storage methods. On the flip side, you can be reasonably sure any future storage methods will be blocked by the same mechanism without hunting for more checkboxes.