Hello Mozilla Community, I’m currently using Firefox for my web design projects and facing some performance issues when testing websites built with modern frameworks. As a developer at '''DE IT SOLUTION '''where we provide website design and development services, I rely on Firefox for testing due to its robust developer tools. However, I’ve noticed: Firefox becomes slow when handling multiple tabs with live previews. Developer Tools sometimes lag during real-time CSS adjustments. I would love advice on: Best practices for optimizing Firefox for web development. Recommended extensions that won’t slow down the browser. Tweaks for faster rendering of web pages during testing. I’ve explored Mozilla’s tips but would appreciate insights from this expert community. Also, if you’re interested in how UX/UI impacts web performance, you might enjoy this article from my experience: Why UX/UI Design Matters in Web Development (Sharing for learning purposes). Thank you in advance for your suggestions!