Unfortunately, /e/ Browser doesn’t allow the use of extensions (maybe it’s “work in progress”?).
So you may want to switch to Firefox or one of its variants (I personally use https://play.google.com/store/apps/details?id=net.waterfox.android.release), or, if you want to stick to a Chrome-based browser, https://kiwibrowser.com/ (the only Chrome-based Android browser I know with extensions support).