The 'tweak: Mock and Modify HTTP Requests' Firefox add-on is a tool for developers to intercept, delay and modify HTTP requests without leaving the browser. It includes premium features like writing custom JavaScript for response data, changing rules in bulk using global variables, creating mock data with random generators and debugging requests with tweak’s breakpoints and logpoints. However, it does not support request redirection or replacing documents.
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tl;dr
tweak allows you to mock and modify HTTP requests without leaving the browser
You can intercept requests and 🪄
﹥ Modify
⁃ Response data and headers
⁃ Status code
⁃ Request payload 💸
⁃ Request headers 💸
﹥ Delay individual requests ﹥ Export and import rules to organize and share your configs with your team
﹥ Search requests in the background to import them automatically
Premium 💸
﹥ Modify the response data by writing custom JavaScript
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spammy, or outdated.
Pros
Easy to use and set up
Useful for mocking server response for development
Clean and nice looking UI
Cons
Unreliable, not intercepting all API calls
Slow to set up and sometimes glitchy
Stopped working or erroring for some users
Most mentioned
Easy to use and set up
Unreliable intercepting of API calls
Stopped working or erroring
Recent reviews
According to the Website, there is already a version 8.2.0. However, this version is not being release for Firefox for whatever reason.
Seem to have completely stopped working some time ago (and looking at the last update, not surprising – looks like Firefox is at least 2 major releases behind). When enabled, requests are significantly delayed and always replaced with no content instead of what is in the response field. It might be a CORS issue, but I am not sure. Anyway, any intercepted request will end with unexpected end of data at line 1 column 1.
Was looking for a way to return a specific statuscode and error message on a request to debug an issue and this extension had me covered in a couple of minutes. Lifesaver for sure.
tweak: mock and modify HTTP requests 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
tweak: mock and modify HTTP requests has earned a fairly good reputation and likely can be trusted.
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