JustBrowser
← Back to Home

Acceptable Use Policy

Last updated: September 21, 2026

JustBrowser is an antidetect browser that lets you run many isolated browser profiles, each with its own fingerprint, proxy and storage. That capability is useful to people who manage their own accounts, protect their privacy, test software or do research. It can also be misused to defeat the anti-fraud systems of other people's platforms. This policy draws the line between the two. It applies to everyone who uses the JustBrowser desktop app, web dashboard, local API, cloud sync, team workspaces or proxy marketplace (together, "the Service"), operated by Velocity Digital Labs LLC ("we", "us").

1. About this policy

This Acceptable Use Policy ("this Policy") is part of the JustBrowser Terms of Service at /terms and is incorporated into them by reference. If you use the Service, you agree to this Policy. If this Policy and the Terms conflict, the Terms control, except that this Policy governs which uses are permitted and prohibited.

"You" means the person or organisation that holds a JustBrowser account, and every person who uses the Service under that account, including team seats. "Profile" means a browser profile created or run in the Service. "Platform" means any third-party website, app, service or network that you reach through a profile.

This Policy is not a checklist that ends at the last bullet. If a use is not named here but is plainly of the same kind as something we prohibit, it is prohibited.

2. The line we draw

The Service is built to keep separate browser identities separate. Whether a given use is acceptable depends on two things: whether you are entitled to operate the accounts and systems involved, and whether the platform on the other end permits what you are doing.

Put simply: managing what is yours, or what you have been authorised to manage, within the rules of the platform you are using, is acceptable. Pretending to be someone you are not, getting back into a place you were removed from, or manufacturing activity that a platform or advertiser will treat as genuine, is not.

2.1 Permitted uses

The following are examples of uses we consider legitimate, provided you also comply with section 3:

  • Operating accounts that you own, or that a client or employer has authorised you to operate on their behalf, including agencies and social media managers running multiple client accounts.
  • Keeping business, personal and client activity in separate, isolated profiles so that one does not leak into another.
  • Protecting your privacy by limiting the browser fingerprint and tracking data that websites can collect about you.
  • Quality assurance and testing: checking how your own site, ad or app behaves across operating systems, screen sizes, locales, time zones and network locations.
  • Research, price comparison, market intelligence and ad verification, carried out within the terms of the sites you visit and without circumventing their access controls.
  • Automation through the local API, where the platform you are automating permits it and you stay within its rate limits and rules.
  • Cookie warm-up and profile aging on profiles used for accounts you are permitted to hold.

2.2 Prohibited uses in outline

Sections 3 to 10 set out what you may not do. In outline, you may not use the Service to:

  • Break the terms of the platforms you access, evade a ban or suspension a platform has imposed on you, or hold accounts a platform has told you that you may not hold.
  • Access any computer system without authorisation.
  • Generate fraudulent impressions, clicks, conversions, installs, views or engagement.
  • Impersonate other people or organisations, or run coordinated inauthentic behaviour.
  • Commit fraud, phishing, spam, or distribute malware.
  • Process other people's personal data without a lawful basis.
  • Deal with sanctioned parties or operate from embargoed jurisdictions.
  • Infringe intellectual property, reverse engineer the Service, share credentials or resell the Service.

3. Platform rules and account integrity

You must comply with the terms of service, community guidelines, advertising policies and other rules of every platform you access through a profile. You bear sole responsibility for that compliance. We do not review the rules of the platforms you use, we do not know which platforms you use, and we cannot tell you whether a given activity is allowed on a given platform. Isolating your accounts in separate profiles does not change what those platforms permit.

Nothing in the Service, in our marketing or in our support correspondence is a representation that any platform allows multiple accounts, automation or the use of an antidetect browser. Check the platform's rules yourself before you rely on the Service.

3.1 Prohibited

You may not use the Service to:

  • Evade, circumvent or work around a ban, suspension, restriction, rate limit, verification requirement or other enforcement action that a platform has applied to you, your organisation or an account you control, including by creating a replacement account after a ban.
  • Create, hold or operate accounts on a platform that you are not permitted to hold under its rules, including accounts in excess of a per-person limit, accounts in a region you are not eligible for, or accounts opened in another person's name without their authority.
  • Impersonate any person, business, government body or other organisation, or misrepresent your identity, affiliation or authority to a platform or to its users.
  • Engage in coordinated inauthentic behaviour: operating networks of accounts that appear independent but are controlled together, in order to manipulate rankings, reviews, votes, trends, ratings, follower counts, reach, public opinion or the outcome of any promotion, giveaway, ballot or contest.
  • Artificially inflate or deflate the popularity, reputation or rating of any product, service, person, page or content.
  • Obtain platform benefits you are not entitled to, such as promotional credits, referral bonuses, sign-up offers, free tiers or trial periods, by presenting yourself as multiple distinct people.

4. Unauthorized access to computer systems

You may not use the Service to access any computer, server, account, network, API or data without authorisation, or to exceed the authorisation you have. This includes conduct that would violate the United States Computer Fraud and Abuse Act (18 U.S.C. § 1030), the equivalent laws of any state, and the equivalent laws of any other country, such as the United Kingdom Computer Misuse Act 1990 and the laws implementing the EU Directive on attacks against information systems.

In particular, you may not:

  • Log in to an account with credentials you obtained without the account holder's permission, or that the account holder is not permitted to share with you.
  • Bypass, probe or test an authentication mechanism, access control, CAPTCHA, bot-detection system or other technical protection on a system you are not authorised to test.
  • Scan, probe or attack the networks or systems of others, or use the Service as a vantage point for penetration testing without a written engagement from the system owner.
  • Interfere with the operation of any system, including by denial-of-service, flooding, or generating load that the system owner has not agreed to.
  • Scrape or collect data in breach of a site's terms, in circumvention of its access controls, or after being told to stop.

4.1 Security research on the Service itself

If you discover a vulnerability in the Service, tell us at [email protected] before you disclose it to anyone else and give us a reasonable time to fix it. Our security disclosure page at /security describes what is in scope, how to report, and the conditions under which good-faith research is not treated as a breach of this Policy (see section 9.1). We do not run a bug bounty programme.

Do not access, or attempt to access, other customers' accounts or data, and do not run scanning, automated attacks or load tests against our production systems outside the scope that /security describes. Section 9 applies to our infrastructure.

5. Ad fraud, click fraud and invalid traffic

You may not use the Service to generate invalid traffic or to deceive any advertiser, publisher, ad network, affiliate network, attribution provider or measurement service. This prohibition applies whether you are paid for the traffic, whether the activity is automated or manual, and whether you act for yourself or for a client.

Prohibited conduct includes:

  • Fabricating ad impressions, clicks, views, installs, sign-ups, leads, conversions, purchases or any other event that an advertiser pays for or measures.
  • Clicking on, viewing or interacting with ads for the purpose of generating revenue for a publisher or exhausting a competitor's advertising budget.
  • Manufacturing engagement (likes, follows, comments, shares, watch time, streams, plays, reviews) that is not the genuine activity of a real, independent person.
  • Affiliate fraud, including cookie stuffing, self-referral, and attributing conversions to traffic you did not genuinely send.
  • Misrepresenting the source, geography, device or quality of traffic to any party that measures or pays for it.
  • Registering for or participating in any incentive, rewards, cashback or referral programme in a way its operator prohibits.

6. Fraud, deception, malware and spam

You may not use the Service to:

  • Commit or facilitate fraud, theft, money laundering, or any scheme intended to obtain money, goods, services, credentials or data by deception.
  • Run phishing or social-engineering operations, or create pages, forms or messages designed to trick people into disclosing passwords, payment details or personal information.
  • Create, distribute, host or control malware, ransomware, spyware, botnets, keyloggers or any code designed to damage, disrupt or gain unauthorised access to systems or data.
  • Send unsolicited bulk messages of any kind (email, direct messages, comments, SMS, forum posts) or otherwise violate anti-spam laws such as the US CAN-SPAM Act.
  • Trade in stolen accounts, stolen credentials, stolen payment cards, counterfeit goods or illegal products, or facilitate such trade.
  • Harass, threaten, stalk, dox or intimidate any person, or use the Service to evade a block or restraining measure that another person has placed on you.
  • Create, access or distribute child sexual abuse material or any other content that is illegal to possess or distribute. We report this to the relevant authorities without notice to you.
  • Do anything else that is illegal where you are, where we are (Delaware, USA), or where the affected platform or person is.

7. Personal data of others

Profiles can hold cookies, sessions, saved logins and browser storage, and cloud sync moves those archives to our storage. If a profile contains personal data about people other than you, you are the controller of that data and you are responsible for it. You may not use the Service to collect, store, sync, share or otherwise process personal data of other people unless you have a lawful basis to do so under the data-protection laws that apply to you and to those people, such as the EU and UK GDPR, the California Consumer Privacy Act and similar laws.

In particular, you may not use the Service to build profiles of individuals from data they did not give you, to import cookies or sessions that belong to another person without their permission, or to share a profile with someone who is not entitled to see the data it contains. Our own handling of the data we hold about you is described at /privacy.

8. Sanctions and export control

You may not use the Service if you are, or you act for, a person or entity that is the subject of sanctions administered by the United States (including the OFAC Specially Designated Nationals list), the United Nations, the European Union or the United Kingdom, or if you are located in or ordinarily resident in a country or region that is subject to a comprehensive US embargo. You may not use the Service, including proxies purchased through the marketplace, to provide services to, or to access platforms on behalf of, any such person, entity or jurisdiction.

Any export-control or sanctions provisions in the Terms at /terms also apply to your use of the Service. If those provisions and this section differ, the Terms govern.

9. Misuse of the Service itself

The following apply to the Service, its software and its infrastructure, rather than to the platforms you visit through it. You may not:

  • Reverse engineer, decompile, disassemble or otherwise attempt to derive the source code of the JustBrowser desktop app, the browser core pinned to each profile, the dashboard or the API, except to the extent that applicable law, or the open-source licence of a component as identified in the Terms, expressly permits this despite a contractual restriction.
  • Modify the desktop app or the browser core pinned to a profile, remove or alter any notice in either of them, or distribute modified copies.
  • Share your account credentials, your dashboard-issued API tokens or your local API token with anyone outside your account. Team access is the supported way to give other people access; see section 11.
  • Resell, sublicense, rent, lease, lend or otherwise commercialise the Service or any part of it, including proxy allocations bought through the marketplace, or offer the Service as a hosted service to third parties. Reselling requires a separate written agreement with us.
  • Obtain more than one free trial. Trials are one per person, enforced per account and per payment card; a trial started with a card that has already been used for one is refused and the subscription cancelled without charge, and opening extra accounts or using extra cards to obtain further trials is a breach of this Policy.
  • Interfere with the Service, its sync storage, its billing or its team features, probe or attack our infrastructure, or place load on it beyond normal use.
  • Infringe our or anyone else's copyright, trademark, patent, trade secret or other intellectual property rights, including by using the Service to distribute infringing content.
  • Use the Service to develop a competing product, or to benchmark it for publication without our written consent.

9.1 Security research safe harbour

Good-faith security research that complies with our security disclosure page at /security is not a breach of this section or of the reverse-engineering restriction, to the extent the research stays within the scope that page describes.

10. Proxies and the proxy marketplace

Proxies purchased through the in-app marketplace are third-party allocations that we resell. When you buy one, you must also comply with the acceptable use terms of the provider that fulfils it (currently DataImpulse or Oxylabs). The provider receives a pseudonymous identifier derived from your account id so it can attach the allocation to you; we never send it your name or email. Everything in this Policy applies to traffic you send through a marketplace proxy or through any proxy you configure yourself.

In addition, you may not use a proxy obtained through the Service to hide the origin of activity that this Policy prohibits, to attack or scan the proxy provider's or anyone else's network, or to send traffic that causes the provider to suspend the allocation. Allocations are non-refundable once delivered, and if a provider terminates an allocation because of your conduct, you are not entitled to a refund or replacement; see /refund.

11. Teams, seats and shared profiles

A team workspace lets an owner invite members as seats at no charge. A seat may only open profiles that the owner has shared into the workspace; every member sees the same shared set. Profiles can also be shared directly from one user to another, with view-only or launch permission as the owner chooses.

The owner of a team account is responsible for every seat in it and for everything done through profiles that the team shares. This means the owner must ensure that each member has read and complies with this Policy, that profiles are only shared with people entitled to operate the accounts they contain, and that access is removed promptly when a member leaves. A breach of this Policy by a seat is treated as a breach by the owner, and we may suspend or terminate the whole team account in response.

When you share a profile directly with another user, whether with view-only or launch permission, you are responsible for making sure that person is permitted to see or use the accounts and data inside it, and you remain responsible for that profile's use until you revoke the share.

12. Local API and automation

The desktop app exposes a local REST API on your own machine, protected by a bearer token that is generated on that machine and stays there. That local token is separate from the API tokens you can issue in the web dashboard, which authenticate calls to our cloud API and are stored against your account with the time they were last used. Automation does not change what is permitted. Anything you may not do by hand under this Policy you may not do through either API, through a script, or through third-party automation tools connected to it.

Keep both kinds of token private. If the local API token is exposed, regenerate it from the app's API settings, which invalidates the old token.

13. Reporting abuse

If you believe someone is using JustBrowser in breach of this Policy, or that the Service is being used to harm you or your platform, email [email protected]. This address is monitored by Velocity Digital Labs LLC.

To help us act, include as much of the following as you can: what you observed, when it happened, the platform or system affected, any account names, email addresses, IP addresses or other identifiers involved, and any evidence you are able to share. We may not be able to act on a report that gives us nothing to match against our records.

We do not collect browsing history or page content from inside profiles and we do not open synced profile archives, so we usually cannot see what a user did on your platform. What we can do is match the identifiers you give us against our account, registration, device-session, team, billing and proxy-marketplace records and the profile summaries described in the Privacy Policy at /privacy, and act on our own account. A profile summary tells us a profile's name, settings and the sites it holds saved logins for, not what was done on those sites.

14. What we do about a breach

We may investigate any suspected breach of this Policy. Where we reasonably believe a breach has occurred or is likely, we may take any of the following actions without prior notice, in our discretion:

  • Warn you and ask for the conduct to stop.
  • Suspend your account, a team account or a specific seat immediately, including during an investigation. The suspension and termination provisions of the Terms at /terms apply.
  • Terminate your account and end your subscription. No refund is due where an account is terminated for breach of this Policy; see /refund.
  • Cancel or refuse marketplace proxy allocations and notify the provider.
  • Remove shared profiles from the accounts they were shared with.
  • Refuse to do business with you or with accounts we reasonably believe you control, including future trial or subscription requests.
  • Report the conduct to the affected platform, to law enforcement or to another appropriate authority where we consider it necessary, and preserve relevant records for that purpose.

14.1 Cooperation with lawful requests

We may disclose account information (including the IP address, user agent and email address logged when the account was registered), desktop device session records (IP address, user agent, device name and operating system, app version and last-seen time), billing and proxy-marketplace purchase records, API token records, team and sharing records, the profile summaries described in the Privacy Policy and support correspondence in response to a subpoena, court order, warrant or other lawful request, or where we believe in good faith that disclosure is necessary to prevent harm, protect our rights or comply with the law. Where the law permits and it is practical, we may tell you before we disclose. Synced profile archives are encrypted at rest and we do not open or read them in the ordinary course; details of what we hold, including the profile summary stored alongside each archive, and how long we keep it are at /privacy.

14.2 Your responsibility for consequences

You are responsible for the consequences of your use of the Service, including any account bans, loss of access, financial loss or legal claims that result from activity that breaches this Policy or a platform's rules. The limitation of liability and indemnity provisions of the Terms at /terms apply.

15. Changes to this policy

We may update this Policy as the Service, the law and the platforms our customers use change. When we do, we will post the updated version at /acceptable-use with a new "last updated" date and, for changes that narrow what you may do or reduce your rights, notify account holders by email before they take effect. A change takes effect on the date shown on the updated Policy, or on any later date stated in the notice. Continued use of the Service after a change takes effect means you accept the updated Policy.

The notice period in the Terms at /terms applies to changes to the Terms themselves; changes to this Policy are notified as this section states.

16. Contact

Velocity Digital Labs LLC, 131 Continental Dr, Suite 305, Newark, DE 19713, USA.

Abuse reports, legal notices and questions about this Policy or the Terms: [email protected]. Privacy questions and data-subject requests: [email protected]. To delete your account, email [email protected] from the address on the account; we delete your data within 30 days except where law requires retention. Refunds: see /refund; refund requests go to [email protected]. Security vulnerabilities in the Service: [email protected]; see /security.

We'd like to use Google Analytics, a Google service, to understand how our website is used. It sets two cookies in your browser and runs only if you click Accept. You can change your choice at any time with Cookie settings. Cookie Policy

Sign-in cookies and the cookie that remembers this choice are always on; the website needs them to work.

Google Analytics, a Google service, helps us understand how our website is used. It sets two cookies, _ga and _ga_TVZHQ99TZW. It is now onoff in this browser. If your browser sends a Global Privacy Control or Do Not Track signal, it stays off. Cookie Policy