EtherAddressLookup: Secure Ethereum Browsing with Smart Address Detection

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Introduction to EtherAddressLookup

Navigating the Ethereum ecosystem can be both exciting and risky. With decentralized applications (dApps), wallet interactions, and frequent transactions, users are constantly exposed to potential phishing attacks and malicious domains. EtherAddressLookup is a powerful browser extension designed to enhance your online security by automatically detecting Ethereum addresses and protecting you from known scam websites.

Built for both Chrome and Firefox, this open-source tool streamlines your blockchain experience while adding a critical layer of protection. Whether you're checking transaction histories or interacting with smart contracts, EtherAddressLookup ensures you stay safe and informed.

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How EtherAddressLookup Enhances Your Security

Automatic Address Linking

One of the core features of EtherAddressLookup is its ability to scan web pages for strings that resemble Ethereum addresses — including ERC20 token addresses — and convert them into clickable links. These links direct you to your preferred blockchain explorer such as Etherscan, allowing instant access to transaction history, token balances, and contract details without manual copying or pasting.

This functionality saves time and reduces human error when verifying wallet activity or investigating suspicious transfers.

Phishing Protection Using Smart Blacklists

Beyond convenience, EtherAddressLookup actively defends against private key phishing scams. The extension uses curated blacklists of known malicious domains. When you visit a flagged site, the extension wipes the DOM (Document Object Model) and displays a clear warning message, preventing interaction with dangerous content.

To catch newly created phishing sites, the system employs a Levenshtein distance algorithm, which detects domain names similar to known scams. For example, if “myetherwallet.com” is legitimate, a lookalike like “myeth3rwallet.com” may be blocked due to its close resemblance.

While highly effective, this method can occasionally result in false positives. If a legitimate site is mistakenly blocked, it can be added to the whitelist through community contributions.

Installation Guide

Browser Extensions (Recommended)

For most users, installing the official extension is the easiest and safest method:

Both versions receive automatic updates, ensuring you always have the latest security patches and feature improvements.

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Manual Installation (Advanced Users)

Developers or those who prefer full control can install the extension manually from the GitHub repository:

Chrome

  1. Clone or download the repo from GitHub.
  2. Navigate to chrome://extensions in your browser.
  3. Enable Developer Mode.
  4. Drag and drop the manifest.json file into the window to load the extension.

Firefox

  1. Clone or download the repo.
  2. Go to about:debugging in Firefox.
  3. Click "Load Temporary Add-on".
  4. Select the manifest.json file from the downloaded folder.
⚠️ Note: Manually installed versions do not receive automatic updates. You must re-install after each new release.

Community-Driven Security Updates

EtherAddressLookup thrives on community participation. Users are encouraged to contribute by reporting new phishing domains or requesting removal of incorrectly blocked sites.

How to Submit a Pull Request

You don’t need to be a developer to help improve security for everyone:

  1. Create a free GitHub account if you don’t already have one.

  2. Navigate to the relevant file:

    • Add domains to blacklist.json if they host scams.
    • Add domains to whitelist.json if they’re falsely flagged.
  3. Click the pencil icon to edit.

  4. Insert your domain in the correct format:

    "yourdomain.com",
"www.yourdomain.com"
  5. In the commit message, explain your change with evidence (e.g., tweet, Reddit post, screenshot).
  6. Submit your pull request.

Once reviewed by maintainers (@409H and @tayvano), valid changes are merged quickly.

This collaborative approach keeps defenses strong and responsive in an ever-evolving threat landscape.

Blacklist & Whitelist Management

Blacklisted Domains

Only trusted maintainers can directly modify the blacklist to prevent tampering. To request changes:

Include detailed reasoning and evidence so reviewers can verify legitimacy swiftly.

Whitelisted Domains

The whitelist prevents false positives caused by the Levenshtein algorithm. If your site is incorrectly blocked:

Special thanks to contributors like @sogoiii for refining detection logic and improving accuracy.

Frequently Asked Questions (FAQ)

Q: Is EtherAddressLookup compatible with mobile browsers?
A: Currently, the extension supports desktop versions of Chrome and Firefox only. Mobile support is not available at this time.

Q: Does it work with non-Ethereum blockchains?
A: While primarily focused on Ethereum and ERC20 tokens, some address patterns may be detected, but full multi-chain support is not implemented.

Q: Can I customize my default blockchain explorer?
A: Yes, settings allow you to choose your preferred explorer for address lookups, enhancing personalization and usability.

Q: How often are blacklists updated?
A: Updates occur regularly based on community reports and automated monitoring systems. Official releases roll out verified changes promptly.

Q: Is my browsing data collected by the extension?
A: No. EtherAddressLookup operates locally in your browser and does not transmit personal or browsing data anywhere.

Q: What should I do if I encounter a new phishing site?
A: Report it immediately via GitHub by opening an issue or submitting a pull request with evidence such as screenshots or social media posts.

Acknowledgments

The success of EtherAddressLookup is powered by collaboration:

These contributions ensure EtherAddressLookup remains reliable, up-to-date, and community-focused.

Final Thoughts

In a digital world where crypto scams evolve daily, tools like EtherAddressLookup are essential for safe navigation. By combining automated address detection with intelligent phishing protection, it empowers users to interact confidently within the Ethereum space.

Whether you're a casual user or an experienced developer, integrating EtherAddressLookup into your workflow adds peace of mind and efficiency.

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Check the latest updates on Harry Denley’s blog or contribute directly on GitHub to help build a safer blockchain future for all.