kthoom is an open source comic book reader you can use in your browser or as a Progressive Web App (PWA). It lets you opencomic book archive files (CBR, CBZ) from your local hard drive, from a URL, from Google Drive, and fromIPFS.
You can try ithere.
As described in the officialPrivacy Policy page, kthoom does not request any user data itself, but in order to access comic books from Google Drive, it is required to authenticate with Google. In order to that, I have applied for OAuth App Verification, which requires me to provide a homepage for the project that is under a domain I control. Thus,this page.