У вашего броузера проблема в совместимости с HTML5
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This guide doesn't get you the achievement easier, it gets you it faster. SUBSCRIBE FOR MORE!!!
Step by step:
1. Go to your map and open online contracts, select online tailing.
2. Tail 5-10 people (10 gets you an achievement)
3. Wait for 15-20 minutes
4. Once you're being tailed stand still
5. Repeat until you get achievement