Why we need following permissions?

1. webRequest
   We need to post tab url to Quick Heal Anti-Virus and get verdict(allow/block) from Quick Heal AV. Quick Heal Anti-Virus will give verdict based on internal algorithm which identifies if url is malicious/phishing or falls into blocked category.
2. Tabs
   We need to observe the activity of tabs for url browsing/download activity. As per the extension functionality,
   we redirect the tab and show HTML block page if browsed url is malicious/phishing or falls into blocked category.
3. Host permission
   We need Host permission to monitor urls accessed by the user and communicate it with Quick Heal Anti-Virus as mentioned in webRequest Justification, via http protocol.
4. Storage
   Local storage is used to store the port number, which is used for communication with Quick Heal Anti-Virus.
5. Downloads
   We need to observe the activity of tabs for url download. As per the extension functionality, we redirect the tab and show HTML block page, if downloading url is malicious. Also, we block the download.