Show hidden inputs in HTML pages with this simple addon. The addon was created for testing purposes.
In the newer version the name or the id of the hidden input is displayed.

Form Hack - Uncover Hidden Inputs
Form Hack is a simple and convenient Firefox add-on that allows you to effortlessly uncover hidden input fields in HTML pages. It provides a button on the browser's address bar, and with a single click, all hidden input fields are displayed. Originally created for testing purposes, Form Hack now includes the option to show the name or ID of the hidden input, providing even more insight for developers and testers.
Add-on stats
Manifest V2
Rating: 4.40
(10)
Weekly download count: 7
Firefox on Android: Yes
Permissions:
- activeTab
- tabs
Size: 38.42K
Full description: See detailed description
Ranking
Other platforms
Not available on Chrome
Not available on Android
Not available on Edge
User reviews
by 退出党团队远离中共邪教, 2025-02-25
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by GanJingWorld, 2022-12-24
Add-on safety
Risk impact
Form Hack requires a few sensitive permissions. Exercise caution before installing.
Risk impact analysis details
- Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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Risk likelihood
We don't have sufficient data to confidently determine the risk likelihood of Form Hack. Use it at your own risk.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
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