Disable Browser Synchronization

Google Chrome

1. At the top right, click Profile Sync is on.
2. Click Turn off.

Mozilla Firefox

1. Click the menu button (three stacked horizontal lines) and select Settings.
2. Click Sync from the menu options to open the sync settings panel.
3. Click the Change… button in the Syncing: ON subsection.
4. Click Disconnect…. A confirmation prompt will appear.
5. Click the Disconnect button in the prompt.

Microsoft Edge

1. Click on the small three dots on the upper right corner of the page.
2. Click on Settings.
3. By default you're on profile tab.
4. Click on Sync.
5. Click Turn Off Sync.