Chrome extension or javascript implementation for cloud

Feature
1

Is it possible to make something like this?
https://bitbucket.org/marcoschulte/encfsanywhere

so when i open drive.google.com or amazon.com i can press some button and rclone decrypt files?
so i can download them unencrypted?

2

Apparently, someone is working on it: https://github.com/ncw/rclone/issues/1452

3

Do you know Rclone Browser? https://github.com/mmozeiko/RcloneBrowser