[throwwwaway69]

The issue isn't a lack of strength if your wrists, it's over-use of of your wrist.

All you can really do is read up on ergonomics and make sure your setup follows best practices - ones backed by actual research. As SCdF said, take frequent breaks. Pay attention to your wrist and hands when they feel sore.

A couple of things that have worked for me:

1. Switch using your mouse to your non-dominant hand throughout the day. It sucks at first but you will get good pretty quick

2. Use the mouse as little as possible. For web browsing specifically there are good browser plugins that make keyboard nav pretty easy

3. I had a lot of success using an Xbox controller plugged into a computer as a mouse. One joystick to move the cursor, one for scrolling, buttons to emulate mouse clicks. This was good for something like web browsing where I wasn't typing a lot. Or reading documents. It felt a lot more ergonomic than a mouse, kept my wrists at a better angle, and for the most part only used my thumbs and not my wrist.