diff --git a/makefile-installation.md b/makefile-installation.md
index 2c0b43a..3c74662 100644
--- a/makefile-installation.md
+++ b/makefile-installation.md
@@ -1,5 +1,5 @@
 # Odoo and Lokavaluto addons installation
-This document details the installation of Odoo 12.0 plus the addons created by Lokavaluto and available here: [https://github.com/Lokavaluto/lokavaluto-addons](https://github.com/Lokavaluto/lokavaluto-addons). In this installation, we use the branch ```12.0-Exchange_counters_2```. To use anther branch, just change the command in the MakeFile.
+This document details the installation of Odoo 12.0 plus the addons created by Lokavaluto available here: [https://github.com/Lokavaluto/lokavaluto-addons](https://github.com/Lokavaluto/lokavaluto-addons). In this installation, we use the branch ```12.0-Exchange_counters_2```. To use anther branch, just change the command in the MakeFile.
 
 ## Table of Contents
 * [Make file](#Make%20file)
@@ -23,12 +23,41 @@ So if you do not want to use the version 12.0 as Lokavaluto does, change it in t
 For Lokavaluto's addons, you can chose the branch in the Makefile after the comment ```Change Addons' version here```. If you wan to change the branch after the installation, you can rerun the installation or switch branch in the git folder using ```git checkout branch_name``` 
 
 ```Makefile
-.PHONY: odoo python3 pip3 postgre general-dependencies dependencies rtlcss addons run
+.PHONY: odoo python3 pip3 postgre general-dependencies dependencies rtlcss addons run npm aptpost runodoo runfirefox initodoo
 SHELL := /bin/bash
 
-install: odoo python3 pip3 postgre general-dependencies dependencies rtlcss addons
-        @echo -e "Installation : ok \n"
+
+# make prepare
+prepare: python3 pip3 general-dependencies npm aptpost rtlcss
  
+python3:
+	apt install -y python3
+	@echo -e "python3 installation : ok \n"
+
+pip3:
+	apt install -y python3-pip
+	@echo -e "pip3 installation : ok \n"
+
+general-dependencies:
+	sudo apt install -y python3-dev libxml2-dev libxslt1-dev libldap2-dev libsasl2-dev \
+	libtiff5-dev libjpeg8-dev libopenjp2-7-dev zlib1g-dev libfreetype6-dev \
+	liblcms2-dev libwebp-dev libharfbuzz-dev libfribidi-dev libxcb1-dev libpq-dev
+
+npm:
+	apt install -y nodejs npm
+
+rtlcss:
+	npm install -g postcss
+	npm install -g rtlcss
+
+aptpost:
+	apt install -y postgresql postgresql-client
+
+
+# make install
+install: odoo postgre dependencies addons initodoo
+        @echo -e "Installation : ok \n"
+
 .ONESHELL: 
 odoo:
 	@if [ ! -d "./odoo" ] ; then git clone https://github.com/odoo/odoo.git ; fi
@@ -38,36 +67,18 @@ odoo:
 	sed -i 's/psycopg2==2.7.3.1/psycopg2==2.8.3/g' requirements.txt
 	@echo -e "odoo download : ok \n"
 
-python3:
-	apt install -y python3
-	@echo -e "python3 installation : ok \n"
-
-pip3:
-	apt install -y python3-pip
-	@echo -e "pip3 installation : ok \n"
 
 postgre:
-	apt install -y postgresql postgresql-client
 	sudo -u postgres createuser -s $$USER
 	createdb $$USER
 	@echo -e "postgre installation : ok \n"
 
-general-dependencies:
-	sudo apt install -y python3-dev libxml2-dev libxslt1-dev libldap2-dev libsasl2-dev \
-	libtiff5-dev libjpeg8-dev libopenjp2-7-dev zlib1g-dev libfreetype6-dev \
-	liblcms2-dev libwebp-dev libharfbuzz-dev libfribidi-dev libxcb1-dev libpq-dev
-
 .ONESHELL:
 dependencies:
 	cd ./odoo;
 	pip3 install setuptools wheel;
 	pip3 install -r requirements.txt
 
-rtlcss:
-	apt install -y nodejs npm
-	npm install -g postcss
-	npm install -g rtlcss
-
 .ONESHELL:
 addons:
 	@if [ ! -d "./lokavaluto-addons" ] ; then git clone https://github.com/Lokavaluto/lokavaluto-addons.git ; fi
@@ -77,16 +88,30 @@ addons:
 	@echo -e "Addons download : ok \n"
 
 .ONESHELL:
-run:
+initodoo:
+	cd ./odoo
+	python3 odoo-bin --addons-path=addons,../lokavaluto-addons -i base -d admin --stop-after-init
+
+
+# make run
+.ONESHELL:
+run: runfirefox runodoo
+
+.ONESHELL:
+runodoo:
 	cd ./odoo
 	python3 odoo-bin --addons-path=addons,../lokavaluto-addons
+
+runfirefox:
+	firefox http://localhost:8069?debug= &
 ```
 
 ### Installation
-Create the Makedile where you want to install the environnement.
+Create the Makefile where you want to install the environnement.
 After the installation, 2 folders are created ```lokavaluto-addons``` and ```odoo``` containing respectively Lokavaluto's addons and Odoo's source files. The script installs the latest version of Python3, pip3, and postgresql. It also downloads all the dependencies listed here: [https://www.odoo.com/documentation/12.0/setup/install.html#id7](https://www.odoo.com/documentation/12.0/setup/install.html#id7).
 
-To start the installation, just run ```sudo make install```.
+To install all the tools needed for the development run ```sudo make prepare``` (needs privileges).
+To start the installation, just run ```make install```.
 
 
 ### Run Odoo
@@ -96,9 +121,14 @@ The arguments ```--addons-path``` adds the defaults addons folder from Odoo 12.0
 
 Everything should be running without errors nor warnings.
 
+Firefox should start and open the web interface.
 The WEB interface should be available at [http://localhost:8069](http://localhost:8069). You can login using the user ```admin``` and the password ```admin```.
 
 ## Activate the developer mode
+The first way to activate the developer mode is to add ```?debug=``` to the URL : [http://localhost:8069?debug=](http://localhost:8069?debug=).
+
+Otherwise you can activate it throught the WEB interface.
+
 Login using the user ```admin``` and the password ```admin``` and go to ```Settings``` to activate the ```developer mode```.
 
 ![settings](images/settings.png)