when you design your web page with a responsive design, there is an easy way of testing it from your web browser if it is Mozilla Firefox.
Here are the steps:
- Keyboard short cut “Ctrl + Shift + M”
- Open your Mozilla Firefox Browser
- Click on the button right hand corner “open menu” and it will pop up the menu
- Click on “Developer” button in the menu to open “Web developer tools” menu
- Select “Responsive Design View” from the menu items