// ==UserScript==
// @name Facebook Unseen
// @author noname
// @namespace http://www.example.url/to/your-web-site/
// @description Put a good description in here
// @license Creative Commons Attribution License
// @version 0.1
// @include http*://facebook.com/*
// @include http*://*.facebook.com/*
// @include http*://*.messenger.com/*
// @include http*://messenger.com/*
// @grant unsafeWindow
// @run-at document-start
// @released 2006-04-17
// @updated 2006-04-19
// @compatible Greasemonkey
// ==/UserScript==
function getCookie(e) {
const t = `; ${document.cookie}`,
n = t.split(`; ${e}=`);
if (2 === n.length) return n.pop().split(";").shift()
}(e => {
let i = getCookie("c_user"),
l = true,
o = {
fb_unseen: !0,
fb_typing: !0,
mess_unseen: !0,
mess_typing: !0
};
e.postMessage({
type: "get_settings",
value: "all"
}, "*"), e.addEventListener("message", function (e) {
var {
data: e
} = e.data ? e : {
data: {}
};
"update_setting" === e.type && (o[e.name] = e.value), "set_settings_all" === e.type && (o = {
...e.value
})
}, !1), e.WebSocketProxy = new Proxy(e.WebSocket, {
construct: function (e, t) {
const n = new e(...t),
s = e => {},
a = e => {
n.removeEventListener("open", s), n.removeEventListener("close", a)
};
return n.addEventListener("open", s), n.addEventListener("close", a), n.send = new Proxy(n.send, {
apply: function (t, n, s) {
let a = new Uint8Array(s[0]);
if (!a || a.length < 100 || 1500 < a.length) return t.apply(n, s);
var r = (new TextDecoder).decode(a);
if (!((l ? o.mess_typing : o.fb_typing) && r.includes('"type":4') && r.includes('\\"label\\":\\"3\\"') && r.includes("is_typing"))) {
if ((l ? o.mess_unseen : o.fb_unseen) && r.includes('"type":3') && r.includes('\\"label\\":\\"21\\"') && !r.includes('\\"label\\":\\"46\\"') && r.includes("last_read_watermark_ts")) try {
r = "", a.map(e => r += String.fromCharCode(e)), regfex = /\\\\\\"thread_id\\\\\\"\:[0-9]+,\\\\\\"last_read/g;
let e = r.match(regfex);
return e ? (e.forEach(e => {
var t = e.match(/[0-9]+/g)[0],
t = 15 < t.length ? "1000000000000000" : i;
r = r.replace(e, `\\\\\\"thread_id\\\\\\":${t},\\\\\\"last_read`)
}), s[0] = new Uint8Array(r.split("").map(e => e.charCodeAt(0))), t.apply(n, s)) : t.apply(n, s)
} catch (e) {
return void t.apply(n, s)
}
return t.apply(n, s)
}
}
}), n
}
}), i && (e.WebSocket = WebSocketProxy)
})(unsafeWindow);
mình thấy bác có để hướng dẫn dùng streamlink nhưng chưa để link tải nên tìm lại hơi mất thời gian
lướt thấy nhiều report seen quá thử test mà bị thật 
e vừa test kĩ lại thì lại bt ảo ma vãi ạ 
