I don't understand why can't this be blocked by content blockers. I tried open a .wbn in the original article, and tried to inspect the resources using devtool,

I don't understand why can't this be blocked by content blockers. I tried open a .wbn in the original article, and tried to inspect the resources using devtool, it still have files listed there. So content blockers can still block something like xxx.wbn:/js/ads.js if browser have such api. Also, I think web bundle can be a Electron replacement too for some use cases, so that some totally offline JavaScript webapp don't have to use Electron.