I\'d like to download the .crx file of an extension from webstore, I use fiddler to analyze the network request when I install an extension from webstore and got it.
For
To download the chrome extension from a given id, you could just use like this
var currentEXTId = 'bjclhonkhgkidmlkghlkiffhoikhaajg';
let downloadURL = https://clients2.google.com/service/update2/crx?response=redirect&x=id%3D" + currentEXTId + "%26uc&prodversion=32;
The above one is the download URL for the chrome extension. There is also a chrome extension which could help you for downloading chrome extension as zip or crx file.https://chrome.google.com/webstore/detail/crx-extractordownloader/ajkhmmldknmfjnmeedkbkkojgobmljda
Also the code for how its done is available in this Github repo