Most of the web designers work on a combination of tools depending on the tasks and workflows involved. Some include:
Designing & prototyping: Figma, Adobe XD, Sketch
Code Editors: Visual Studio Code, Sublime Text
Version control: Git (often via GitHub)
Browser developer tools: Chrome DevTools, Firefox Developer Tools
User testing: UXtweak, UserTesting
Graphics editing: Adobe Photoshop, Illustrator
Project management: Trello, Asana
Communication: Slack, Microsoft Teams