diff --git a/README.md b/README.md
index ce96146..0c03b90 100644
--- a/README.md
+++ b/README.md
@@ -71,6 +71,7 @@ X-API-Key: <key>
 		{"type": "wait_for", "selector": ".dashboard", "timeout": 30}
 	],
 	"proxy": "socks5://user:pass@host:port",
+	
 	"screen": "1280x920",
 	"user_agent": "Firefox",
 	"time_zone": "",
diff --git a/docs/Introduction.md b/docs/Introduction.md
index 3c65bdd..dae466c 100644
--- a/docs/Introduction.md
+++ b/docs/Introduction.md
@@ -10,7 +10,7 @@
 - proxy - обязательно нужно задать прокси, система не станет палить свою инфраструктуру
 - time_zone - временная зона
 - locale - языковая настройка
-- user_agent - заголовок браузера, если не передать будет использован свой
+- user_agent - заголовок браузера Firefox, если не передать будет использован свой
 - screen - размер окна, по умолчанию: 1280х920
 - timeout - общий таймаут выполнения запроса, по умолчанию: 120
 - captcha - токен сервиса распознавания, если требуется решить капчу на странице
diff --git a/src/engine/schemas.py b/src/engine/schemas.py
index 84b2771..483c4fa 100644
--- a/src/engine/schemas.py
+++ b/src/engine/schemas.py
@@ -2,6 +2,10 @@ from pydantic import BaseModel
 
 
 class ActionRequest(BaseModel):
+	"""
+	Действие автоматизации. Характеризуется типом и производится над селектором.
+	Набор параметров зависит от типа, этот класс перечисляет все параметры.
+	"""
 	type: str
 	selector: str | None = None
 	value: str | None = None
@@ -9,6 +13,11 @@ class ActionRequest(BaseModel):
 
 
 class SolveRequest(BaseModel):
+	"""
+	# TODO: добавить locale и time_zone
+
+	Объект запроса для автоматизации на сайте.
+	"""
 	url: str
 	proxy: str
 	actions: list[ActionRequest]
diff --git a/src/main.py b/src/main.py
index eaded3f..54fce69 100644
--- a/src/main.py
+++ b/src/main.py
@@ -1,12 +1,36 @@
+import uuid
 from datetime import datetime
+from pathlib import Path
+from typing import Annotated
+from urllib.parse import urlsplit
 
+from browserforge.fingerprints import Screen
 from camoufox.async_api import AsyncCamoufox
+from camoufox.utils import determine_ua_os
+from fastapi import Cookie
 from fastapi import FastAPI
 from fastapi import Request
+from fastapi import Response
 from playwright.async_api import ViewportSize, ProxySettings
+from ua_parser import user_agent_parser
 
-from engine.schemas import SolveRequest
 from engine import actions
+from engine.schemas import SolveRequest
+
+BROWSER_SLOTS = 10
+
+IDENTITY_FILE = Path("identity.json")
+
+
+def parse_proxy(proxy_url: str) -> ProxySettings:
+	parts = urlsplit(proxy_url)
+	server = f"{parts.scheme}://{parts.hostname}:{parts.port}"
+	settings: ProxySettings = {"server": server}
+	if parts.username:
+		settings["username"] = parts.username
+	if parts.password:
+		settings["password"] = parts.password
+	return settings
 
 
 app = FastAPI()
@@ -17,28 +41,71 @@ async def root():
 	return {"message": "Hello World"}
 
 
+_OS_MAP = {'win': 'windows', 'mac': 'macos', 'lin': 'linux'}
+
+
+def parse_os_and_ff(user_agent):
+	os_name = _OS_MAP[determine_ua_os(user_agent)]
+	parsed = user_agent_parser.ParseUserAgent(user_agent)
+	ff_version = int(parsed["major"]) if(
+		parsed.get("family") == "Firefox" and parsed.get("major") )else None
+	return os_name, ff_version
+
+
 @app.post("/v1/solve")
-async def solve(request: Request, payload: SolveRequest):
+async def solve(
+	request: Request,
+	payload: SolveRequest,
+	response: Response,
+	session_id: Annotated[str | None, Cookie()] = None
+):
+	global BROWSER_SLOTS
+
+	if BROWSER_SLOTS <= 0:
+		return {
+			"ok": False,
+			"error": "No slots available",
+		}
+	else:
+		BROWSER_SLOTS -= 1
+
 	api_key = request.headers.get('X-API-Key')
-	async with AsyncCamoufox() as camoufo:
-		# TODO: настройка контекста
-		scr_w, scr_h = payload.screen.split("x")
-		scr_size = ViewportSize(width=int(scr_w), height=int(scr_h))
-		# TODO: распарс proxy-урл и заполнение объекта
-		# proxy = ProxySettings(socks5://host:port, username, password)
-		proxy = None
-		page = await camoufo.new_page(
-			user_agent=payload.user_agent,
-			proxy=proxy,
-			viewport=scr_size,
-			screen=scr_size,
-		)
+
+	if not session_id:
+		session_id = str(uuid.uuid4())
+		response.set_cookie("session_id", session_id)
+
+	scr_w, scr_h = payload.screen.split("x")
+	scr_size = int(scr_w), int(scr_h)
+	# TODO: распарс proxy-урл и заполнение объекта
+	# proxy = ProxySettings(socks5://host:port, username, password)
+	proxy = None
+
+	browser_options = {}
+	if payload.user_agent:
+		os, ff_version = parse_os_and_ff(payload.user_agent)
+		browser_options["os"] = os
+		browser_options["ff_version"] = ff_version
+		browser_options["config"] = {'navigator.UserAgent': payload.user_agent}
+
+	user_data_dir = Path(__file__).parent / f"../extra/user_data_dir/{session_id}"
+	if not user_data_dir.exists():
+		user_data_dir.mkdir(parents=True)
+
+	async with AsyncCamoufox(
+		persistent_context=True,
+		user_data_dir=user_data_dir,
+		proxy=proxy,
+		window=scr_size,
+		**browser_options,
+	) as camoufo:
+		page = camoufo.pages[0] if camoufo.pages else await camoufo.new_page()
 		page.set_default_timeout(30_000)
 		await page.goto(url=payload.url)
 		actions_result = await actions.execute(page, payload.actions)
 		status = not "error" in actions_result[-1]
 		error = ["Something error", None][status]
-		# cookies = await camoufo.cookies()
+		cookies = await camoufo.cookies()
 		html = await page.inner_html('html')
 		await page.screenshot(
 			path=(
@@ -46,10 +113,12 @@ async def solve(request: Request, payload: SolveRequest):
 				f"{datetime.timestamp(datetime.now())}.png"
 			)
 		)
+
+	BROWSER_SLOTS += 1
 	return {
 		"status": ["err", "ok"][status],
 		"html": html,
-		# "cookies": cookies,
+		"cookies": cookies,
 		"actions": actions_result,
 		"error": error,
 	}
diff --git a/tests/test_main.http b/tests/test_main.http
index 2e101be..538bdae 100644
--- a/tests/test_main.http
+++ b/tests/test_main.http
@@ -37,6 +37,7 @@ POST http://127.0.0.1:8000/v1/solve
 Accept: application/json
 Content-Type: application/json
 X-API-Key: <key>
+Cookie: session_id=b8f770a3-38c2-45f2-944b-2703798e3503; Path=/; SameSite=lax
 
 
 {