How to write your own vpn extension for Chrome?

Question

JavaScript

Good time everyone! There is a lot of free time + graduation project on any topic!
As a graduation project, I chose a project related to vpn, and in particular, I need to implement an extension for 2-3 browsers that will block ads (there is a list of hosts).
How to approach the implementation of this project?
Do you need to raise your server (let's say node) to vds, and run the left vpn program there and pass requests through it, or is there an easier way? Is it possible to do this with JS alone?

Answer 1

You don't need a VPN to block ads.
Create extension, specify permissions

// Пример
// Перехват запроса, и блокирование если есть совпадения с url
chrome.webRequest.onBeforeRequest.addListener(
        function(details) { return {cancel: true}; },
        {urls: ["*://www.domain.com/*"]},
        ["blocking"]);

Documentation
https://developer.chrome.com/extensions/webRequest

Answer 2

No way.
The browser cannot create a VPN connection.

Answer 3

Beg your pardon, captain?
VPN and ad blocking are closely related. In addition, all so-called "browser VPNs" are actually just a proxy where the browser comes in to hide the final IP from the site, and the destination IP from the provider. It has nothing to do with real VPNs.