VPN Browser, Unblock Sites - Owl Private Browser

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- we optimized the process of VPN, now you can operate more smoothly for each site's configuration
- besides our recommended 'smart mode', under which the VPN will be automatically turned on when sites are inaccessible, we also added a 'manual mode' for those who want to control the VPN totally manual
- optimized the display logic for our fancy privacy panel
- a game site was added on homepage, hope you would like it :)