Sign In Pro by Neo
Manage and auto-fill login credentials across applications for testing purposes.
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About this extension
Sign In Pro is the ultimate in-page credentials manager tailored specifically for developers, QA testers, and power users who frequently switch between multiple accounts or test environments.
Tired of digging through heavy password managers, copying and pasting credentials, or losing your test accounts? Sign In Pro streamlines your workflow by injecting a sleek, non-intrusive floating widget directly onto any webpage.
Key Features:
• Quick Auto-Fill: Access your saved credentials instantly. Click on a saved profile in the floating widget to automatically inject the username and password directly into the login form without switching tabs.
• Smart DOM Picker: No more manual selector configuration. Visually pick the username and password input fields on any website to map your credentials effortlessly.
• Secure Local Storage: Your data stays with you. All credentials are saved securely within your browser's local extension storage. We do not track, collect, or transmit your data to any external servers.
• Import & Export: Easily back up your credentials to a JSON file and import them across different devices or testing environments using the dedicated Options page.
• Modern, Lightweight UI: Designed with a beautiful, responsive, and intuitive interface that uses Shadow DOM to prevent any styling conflicts with the websites you are testing.
• Privacy First: Requires minimal permissions and operates entirely offline.
How to Use:
1. Click the Sign In Pro extension icon in your Firefox toolbar to toggle the floating widget on the current page.
2. Use the widget's DOM Picker to select the login fields and add new credentials for the site.
3. Simply click on a saved credential to auto-fill the login form instantly.
4. Go to the Add-ons manager and open the extension's Options page to manage, export, or import your credentials.
Simplify your testing workflow today with Sign In Pro!
Tired of digging through heavy password managers, copying and pasting credentials, or losing your test accounts? Sign In Pro streamlines your workflow by injecting a sleek, non-intrusive floating widget directly onto any webpage.
Key Features:
• Quick Auto-Fill: Access your saved credentials instantly. Click on a saved profile in the floating widget to automatically inject the username and password directly into the login form without switching tabs.
• Smart DOM Picker: No more manual selector configuration. Visually pick the username and password input fields on any website to map your credentials effortlessly.
• Secure Local Storage: Your data stays with you. All credentials are saved securely within your browser's local extension storage. We do not track, collect, or transmit your data to any external servers.
• Import & Export: Easily back up your credentials to a JSON file and import them across different devices or testing environments using the dedicated Options page.
• Modern, Lightweight UI: Designed with a beautiful, responsive, and intuitive interface that uses Shadow DOM to prevent any styling conflicts with the websites you are testing.
• Privacy First: Requires minimal permissions and operates entirely offline.
How to Use:
1. Click the Sign In Pro extension icon in your Firefox toolbar to toggle the floating widget on the current page.
2. Use the widget's DOM Picker to select the login fields and add new credentials for the site.
3. Simply click on a saved credential to auto-fill the login form instantly.
4. Go to the Add-ons manager and open the extension's Options page to manage, export, or import your credentials.
Simplify your testing workflow today with Sign In Pro!
Built by a developer, for developers. I got tired of losing test accounts and copy-pasting credentials across staging environments, so built Sign In Pro to stay out of your way until you need it.
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Permissions and data
Required permissions:
- Access your data for all websites
Optional permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.2.0
- Size
- 85.79 KB
- Last updated
- a day ago (Sep 14, 2026)
- Related Categories
- License
- MIT License
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
- Add to collection