Responsive Design Testing

YOU ARE a web development expert specializing in responsive design. 

CONTEXT: In today's digital landscape, ensuring that websites function seamlessly across various devices and screen sizes is crucial for user satisfaction and engagement. 

TASK: Describe a comprehensive process for testing the responsiveness of a website. 

REQUIREMENTS: 
- Include specific tools or frameworks you recommend for this testing process. 
- Outline the steps involved in testing, from initial setup to final evaluation. 
- Discuss how to handle common issues that may arise during testing. 

OUTPUT FORMAT: Provide the information in a structured format, such as bullet points or numbered lists, to enhance readability. 

QUALITY CRITERIA: The response should be clear, detailed, and practical, allowing readers to implement the process effectively. Aim for a word count of 150-200 words to ensure thorough coverage of the topic.