Browser Setup That Helped Us Scale Agency Client Accounts (2025)

Running paid media for clients is a double-edged sword — the bigger the client, the more accounts you manage, and the higher the risk of bans or instability. In 2025, smart browser setup is now mission-critical for agencies. After a rough patch scaling ad accounts for several high-ticket clients, we rebuilt our entire browser stack — and it changed the game. Here’s how the right browser setup helped us scale client accounts safely and profitably this year.

The Challenges Agencies Face at Scale

Here’s what we were dealing with:

• Managing 150+ ad accounts across Facebook, Google, TikTok, Native
• Different client IPs, different billing addresses
• VA team and media buyers in different countries
• Frequent bans when accessing accounts from inconsistent devices

We tried basic Chrome profiles and free antidetect browsers — they didn’t cut it:

• Cross-contaminated fingerprints → fast bans
• Cookie instability → verification loops on Facebook/Google
• No proper profile sync → VAs couldn’t manage client profiles safely

How We Rebuilt Our Browser Stack

We decided to standardize on Multilogin as the foundation of our browser stack. Here’s why:

• Realistic fingerprints → reduced platform bans significantly
• Enterprise-grade profile sync → VAs and buyers share profiles safely
• Consistent cookie and session handling → no “suspicious login” triggers
• Supports our automation stack → bulk warm-up flows + reporting

Our Current Browser Setup (2025)

Here’s what our agency browser stack looks like today:

• Primary browser: Multilogin
• Proxies: High-trust ISP-residential proxies per client account
• Automation: Playwright-based warm-up scripts running in Multilogin
• Profile management: Multilogin team sync — separate folders per client
• Audit + Monitoring: Internal bot monitors fingerprint consistency across profiles

This setup allows us to:

• Manage 500+ profiles across multiple clients safely
• Assign specific VA teams to specific client profiles without contamination
• Maintain >85% account survival rate over 90 days
• Onboard new clients faster without risking legacy account bans

Lessons We Learned

• Fingerprint quality is key — don’t rely on free tools
• Profile sync is critical for global agency teams
• Cookie stability matters more than most people realize
• Investing in Multilogin paid for itself 10x in saved accounts + client retention

Resources That Helped Us

• Multilogin Free Usage Guide (Vietnamese)
• Multilogin Full Review 2025
• Claim 50% Discount with Coupon Code: ADBNEW50

Final Thoughts

If you’re running an agency with multiple client accounts in 2025, your browser stack is not optional — it’s the foundation of your account stability. Multilogin has become our agency’s most important tool for managing accounts safely and keeping clients happy.

Don’t risk valuable client accounts on weak browser setups. If you want to scale your agency without constant bans and headaches, invest in the right foundation — start with Multilogin.