A HackBar for new firefox (Firefox Quantum). This addon is written in webextension and alternatives to the XUL version of original Hackbar. Press F12 to use HackBar

  • HackBar
  • HackBar
What is HackBar?
"HackBar" is a user-friendly Firefox extension specifically created for developers and security researchers. With pressing F12, HackBar opens to allow loading, splitting, and executing URLs directly from the address bar. It enables setting of custom referrers, User Agents, and cookies. This add-on includes various tools for md5, sha1, and sha256 encryption, as well as url and base64 encoding. To bolster easy data visualization, it also embodies a feature to beautify json data, along with providing SQL and XSS functionalities. HackBar empowers users to fully customize their HTTP requestesets while bearing responsibility for the executed code.
Rating: 4.16 (351)
Version: 2.3.1 (Last updated: 2020-06-14)
Creation date: 2017-12-25
Weekly download count: 906
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
  • tabs
  • activeTab
  • webRequest
  • webRequestBlocking
  • <all_urls>
  • storage
Size: 111.05K
Stats date:

Other platforms

HackBar (v2.3.1)
2.06 (16) 9,000
Not available on Edge
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How to use

  • Press F12 to open hackbar


  • Load, split, execute url from address bar.
  • Custom/add referrer url, User Agent, cookie.
  • Tools: md5, sha1, sha256, rot13 encryption, url, base64 encoding, beautifier json data, sql, xss features.


Note: This extension use for developers or security researchers to customs the HTTP requesteset. The user is responsible for the code that's executed.

User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
      Most mentioned
        Recent reviews
        Amazing add
        by Alex Lewis, 2024-04-05

        View all user reviews
        Risk impact

        HackBar is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install HackBar if you trust the publisher.

        Risk likelihood

        HackBar has earned a fairly good reputation and likely can be trusted.

        Upgrade to see risk analysis details