diff --git a/backend/api/blueprints/reports/in_out_report.py b/backend/api/blueprints/reports/in_out_report.py
index e25295a..d88450b 100644
--- a/backend/api/blueprints/reports/in_out_report.py
+++ b/backend/api/blueprints/reports/in_out_report.py
@@ -75,6 +75,7 @@ from cosec_web.cosec_web import CosecWeb
 from backend.shared import constants
 
 # To work with dat and time:
+import time
 import datetime
 
 # For asynchronous activities:
@@ -174,33 +175,41 @@ async def in_out_report_generate(
     # Show all the paths for debugging:
     current_app.printer("PATHS:", chrome_driver_dir, user_data_dir, downloads_dir)
 
-    # Create an instance of the automation object:
-    cosec = CosecWeb(
-        cosec_url = inbound_headers.cosecUrl,
-        username = inbound_headers.cosecUsername,
-        password = inbound_headers.cosecPassword,
-        driver_dir = chrome_driver_dir,
-        user_data_dir = user_data_dir,
-        downloads_dir = downloads_dir,
-    )
+    # Wait for the semaphore so that only one instance is automating Chrome at a time:
+    async with current_app.chrome_semaphore:
 
-    # Perform the login:
-    cosec.login(initial_sleep = 2.5)
+        # First kill the previous processes:
+        kill_count = CosecWeb.kill_chrome_processes()
+        current_app.printer("Killed Chrome Procs.", kill_count)
+        if kill_count > 0: time.sleep(2.5)
 
-    # Get the in/out report:
-    report_path = cosec.get_in_out_summary(
-        initial_sleep = 1.0,
-        from_date = inbound_data.fromDate,
-        to_date = inbound_data.toDate,
-        group_ids = inbound_data.groupIds,
-        download_timeout = 60.0
-    )
+        # Create an instance of the automation object:
+        cosec = CosecWeb(
+            cosec_url = inbound_headers.cosecUrl,
+            username = inbound_headers.cosecUsername,
+            password = inbound_headers.cosecPassword,
+            driver_dir = chrome_driver_dir,
+            user_data_dir = user_data_dir,
+            downloads_dir = downloads_dir,
+        )
 
-    # Log out to end the cycle:
-    cosec.logout()
+        # Perform the login:
+        cosec.login(initial_sleep = 2.5)
 
-    # Close the browser window:
-    cosec.quit()
+        # Get the in/out report:
+        report_path = cosec.get_in_out_summary(
+            initial_sleep = 1.0,
+            from_date = inbound_data.fromDate,
+            to_date = inbound_data.toDate,
+            group_ids = inbound_data.groupIds,
+            download_timeout = 60.0
+        )
+
+        # Log out to end the cycle:
+        cosec.logout()
+
+        # Close the browser window:
+        cosec.quit()
 
     # If we didn't get any path, the download failed:
     if report_path is None:
diff --git a/backend/api/blueprints/reports/muster_roll.py b/backend/api/blueprints/reports/muster_roll.py
index 65f9897..31421d6 100644
--- a/backend/api/blueprints/reports/muster_roll.py
+++ b/backend/api/blueprints/reports/muster_roll.py
@@ -176,31 +176,33 @@ async def muster_roll_report_generate(
     report_data = None
 
     # Get the muster roll data:
-    report_data = muster_roll.load(
-        cosec_url = inbound_headers.cosecUrl,
-        username = inbound_headers.cosecUsername,
-        password = inbound_headers.cosecPassword,
-        group_ids = inbound_data.groupIds,
-        on_date = inbound_data.onDate,
-    )
+    async with current_app.chrome_semaphore:
+        report_data = muster_roll.load(
+            cosec_url = inbound_headers.cosecUrl,
+            username = inbound_headers.cosecUsername,
+            password = inbound_headers.cosecPassword,
+            group_ids = inbound_data.groupIds,
+            on_date = inbound_data.onDate,
+        )
 
     # If data was loaded:
     if report_data is not None:
-        report_data = report_data.copy()
-        report_data = report_data[[
-            "User ID", "User Name", "Category Name",
-            "Grade Name", "Branch Name", "Department Name",
-            "Direct Reporting", "Level-1"
-        ]]
-        unique_branches = report_data["Branch Name"].unique().tolist()
-        unique_depts = report_data[["Branch Name", "Department Name"]].drop_duplicates().to_dict(orient = "records")
-        unique_reportees = report_data[["Branch Name", "Department Name", "Direct Reporting"]].drop_duplicates().to_dict(orient = "records")
-        unique_combos = {
-            "Branch Name": unique_branches,
-            "Department Name": unique_depts,
-            "Direct Reporting": unique_reportees
-        }
-        report_data = unique_combos
+        # report_data = report_data.copy()
+        # report_data = report_data[[
+        #     "User ID", "User Name", "Category Name",
+        #     "Grade Name", "Branch Name", "Department Name",
+        #     "Direct Reporting", "Level-1"
+        # ]]
+        # unique_branches = report_data["Branch Name"].unique().tolist()
+        # unique_depts = report_data[["Branch Name", "Department Name"]].drop_duplicates().to_dict(orient = "records")
+        # unique_reportees = report_data[["Branch Name", "Department Name", "Direct Reporting"]].drop_duplicates().to_dict(orient = "records")
+        # unique_combos = {
+        #     "Branch Name": unique_branches,
+        #     "Department Name": unique_depts,
+        #     "Direct Reporting": unique_reportees
+        # }
+        # report_data = unique_combos
+        report_data = report_data.to_dict(orient = "records")
         success = True
 
     # ┳┓
diff --git a/backend/api/helpers/muster_roll.py b/backend/api/helpers/muster_roll.py
index c059519..b2622fc 100644
--- a/backend/api/helpers/muster_roll.py
+++ b/backend/api/helpers/muster_roll.py
@@ -38,6 +38,9 @@ sys.path.append("..")
 
 # System-level:
 import os
+
+# To work with date and time:
+import time
 import datetime
 
 # For using Quart:
@@ -123,6 +126,11 @@ def load_from_cosec(
     downloads_dir = os.path.join(base_dir, r"downloads")
     masters_dir = os.path.join(base_dir, r"masters")
 
+    # First kill the previous processes:
+    kill_count = CosecWeb.kill_chrome_processes()
+    current_app.printer("Killed Chrome Procs.", kill_count)
+    if kill_count > 0: time.sleep(2.5)
+
     # Create an instance of the automation object:
     current_app.cosec = CosecWeb(
         cosec_url = cosec_url,
diff --git a/backend/api/main.py b/backend/api/main.py
index 4132c6f..5a1b3ea 100644
--- a/backend/api/main.py
+++ b/backend/api/main.py
@@ -59,6 +59,9 @@ from backend.shared import constants
 # To make REST API calls:
 import httpx
 
+# For asynchronous activities:
+import asyncio
+
 # For debugging:
 from icecream import IceCreamDebugger
 
@@ -211,21 +214,11 @@ async def app_startup(**kwargs):
     # ┃┃┃┓┏┏
     # ┛ ┗┗┛┗
 
-    # cosec_creds = files.read_file(
-    #     file_path = os.path.join(
-    #         files.get_parent_directory(
-    #             path = files.get_file_directory(include_filename = False),
-    #             depth = 2
-    #         ),
-    #         "creds",
-    #         "cosec",
-    #         "cosec_velankani.json"
-    #     )
-    # )
+    # Semaphores:
+    current_app.chrome_semaphore = asyncio.Semaphore(1)
+
+    # Helpers:
     muster_roll.init()
-    # muster_roll.load(
-    #
-    # )
 
     # ┏┓┓
     # ┃ ┃┏┓┏┓┏┓┓┏┏┓