Safari

1. Open System Preferences

2. Scroll down and tap on Safari

3. Scroll down and tap microphone and/or camera

4. Change from Deny to Ask or Allow

Firefox

1. Open Firefox

2. Tap the three dots in the top or bottom right corner

3. Tap Settings

4. Tap Site Permissions

5. Change camera and/or microphone to Ask to Allow

Chrome

1. Open Chrome

2. Tap the three dots in the top right corner

3. Tap Settings

4. Tap Site Settings

5. Tap camera and/or microphone and switch them on