add javascript that will run on this domain. back up your scripts in the options area (shortcut there by clicking the "JS" letters in the bottom right)

What is javascript?
"Javascript" is a Firefox add-on designed to boost efficiency and tailor user experience. It allows users to store and execute javascript code on any specific domain. The scripts are kept active across every page on the saved domain, ensuring a personalized browsing experience. The feature to back up scripts in the options area provides additional ease of use.
By: chee
Rating: 4.31 (52)
Version: 0.4.0 (Last updated: 2023-03-01)
Creation date: 2018-10-05
Weekly download count: 428
Firefox on Android: Yes
Risk impact: Moderate risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
  • activeTab
  • storage
  • unlimitedStorage
Size: 395.25K
URLs: Website
Stats date:

Other platforms

Not available on Chrome
Not available on Edge
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save some javascript in a browser_action to run on every page on a domain

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.
  • Easy to use
  • Powerful tools for coding JS
  • Useful for automating tasks
  • Doesn't work with local files
  • Lack of central place to manage all scripts
  • Missing a way to check on which sites it's used
Most mentioned
  • Works well
  • Useful
  • Simple
Recent reviews

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Risk impact

javascript may not be safe to use and it requires some risky permissions. Exercise caution when installing this add-on. Review carefully before installing.

Risk likelihood

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

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