diff --git a/app/app_devtools.py b/app/app_devtools.py
index 4bbe83d4..44ddbdc9 100644
--- a/app/app_devtools.py
+++ b/app/app_devtools.py
@@ -1,100 +1,67 @@
 import devtools
-import os
-from pathlib import Path
 
+## Create Variables
 r1 = {
-    "id": 0,
     "method": "Browser.setDownloadBehavior",
     "params": {
         "behavior": "allowAndName",
-        "downloadPath": "'+str(cwd)+'",
+        "downloadPath": "str(cwd)",
         "eventsEnabled": True,
     },
 }
-r2 = {"id": 1, "method": "Target.getTargets"}
+r2 = {"method": "Target.getTargets"}
 r3 = {
-    "id": 2,
     "method": "Target.createTarget",
-    "params": {"url": "file://'+str(cwd / test.html)+'"},
+    "params": {"url": "file://str(cwd / test.html)"},
 }
 r4 = {
-    "id": 3,
     "method": "Target.attachToTarget",
-    "params": {"flatten": True, "targetId": "+tId+"},
+    "params": {"flatten": True, "targetId": "tId"},
 }
-r5 = {"sessionId": "+sId+", "id": 0, "method": "Page.enable"}
-r6 = {"sessionId": "+sId+", "id": 2, "method": "Page.reload"}
+r5 = {"method": "Page.enable"}
+r6 = {"method": "Page.reload"}
 r7 = {
-    "sessionId": "+sId+",
-    "id": 3,
     "method": "Browser.setDownloadBehavior",
     "params": {
         "behavior": "allow",
-        "downloadPath": "'+str(cwd)+'",
+        "downloadPath": "str(cwd)",
         "eventsEnabled": True,
     },
 }
 r8 = {
-    "sessionId": "+sId+",
-    "id": 13,
     "method": "Page.setDownloadBehavior",
     "params": {
         "behavior": "allow",
-        "downloadPath": "'+str(cwd)+'",
+        "downloadPath": "str(cwd)",
         "eventsEnabled": True,
     },
 }
 r9 = {
-    "sessionId": "+sId+",
-    "id": 23,
     "method": "Page.setInterceptFileChooserDialog",
     "params": {"enabled": True},
 }
-r10 = {"sessionId": "+sId+", "id": 4, "method": "Runtime.enable"}
+r10 = {"method": "Runtime.enable"}
 r11 = {
-    "sessionId": "+sId+",
-    "id": 5,
     "method": "Runtime.compileScript",
     "params": {
-        "expression": "console.log(document.getElementsByTagName(\\'body\\')[0].innerHTML); 10; let goose = document.getElementById(\\'agoose2\\'); goose.download=\\'goose.jpg\\';goose.click();', 'sourceURL':'+str( cwd / 'test.html' )+', 'persistScript':true"
+        "expression": "console.log(document.getElementsByTagName(\\'body\\')[0].innerHTML); 10; let goose = document.getElementById(\\'agoose2\\'); goose.download=\\'goose.jpg\\';goose.click();', 'sourceURL':'str( cwd / 'test.html' )', 'persistScript':true"
     },
 }
 r12 = {
-    "sessionId": "+sId+",
-    "id": 6,
     "method": "Runtime.runScript",
-    "params": {"scriptId": "+scriptId+"},
+    "params": {"scriptId": "scriptId"},
 }
 
+list_r = [r1, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12]
 
-list_r = [r1, r3, r4]
-list_r_session_id = [r7, r8, r9, r11, r12]
+## Create Connection
+browser = devtools.Connection()
+browser.list_tabs()
 
-session_1 = devtools.Session()
+## Print Commands
 for r in list_r:
-    print(session_1.send_command(command=r["method"], params=r["params"]))
-
-print(session_1.send_command(command=r2["method"], params=None))
-
-print(
-    devtools.Session(str(r5["sessionId"])).send_command(
-        command=r5["method"], params=None
-    )
-)
-print(
-    devtools.Session(str(r6["sessionId"])).send_command(
-        command=r6["method"], params=None
-    )
-)
-print(
-    devtools.Session(str(r10["sessionId"])).send_command(
-        command=r10["method"], params=None
-    )
-)
-
-for r in list_r_session_id:
     print(
-        devtools.Session(str(r["sessionId"])).send_command(
-            command=r["method"], params=r["params"]
+        browser.browser_session.send_command(
+            command=r["method"], params=r["params"] if "params" in r else None
         )
     )
diff --git a/devtools/connection.py b/devtools/connection.py
index 59b638e9..4113d8d3 100644
--- a/devtools/connection.py
+++ b/devtools/connection.py
@@ -25,3 +25,6 @@ def list_tabs(self):
     def close_tab(self, session_obj):
         del self.tab_sessions[id(session_obj)]
         print(f"The following session was deleted: {session_obj.session_id}")
+
+    def send_command(self, command, params=None, cb=None):
+        return self.browser_session.send_command(self, command, params, cb)
diff --git a/devtools/session.py b/devtools/session.py
index c2751ea0..3038c732 100644
--- a/devtools/session.py
+++ b/devtools/session.py
@@ -13,7 +13,7 @@ def __init__(self, parent, session_id=""):
         self.message_id = 0
         self.parent_connection = parent
 
-    def send_command(self, command, params, cb=None):
+    def send_command(self, command, params=None, cb=None):
         if cb and not callable(cb):
             raise TypeError("The arg that you use, is not able at cb")
         if not isinstance(command, str):
@@ -25,9 +25,11 @@ def send_command(self, command, params, cb=None):
         json_command = {
             "id": self.message_id,
             "method": command,
-            "params": params,
         }
 
+        if params:
+            json_command["params"] = params
+
         if self.session_id != "":
             json_command["session_id"] = self.session_id
 
diff --git a/pyproject.toml b/pyproject.toml
index b2d1d898..5123b0bd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,3 +15,6 @@ version = "0.0.1"
 dev = [
   "pytest",
   ]
+
+[tool.ruff.lint]
+ignore = ["E701"]