Request Interceptor
Intercept HTTP and HTTPS Requests. Add custom rules to modify request/response headers, block/redirect requests, modify query params.
Example Usage:
This extension can be used to block all ads having url (*/ad.x.com/*) by creating rules
Request Interceptor - Modify & Control Web Requests Add-on
'Request Interceptor' is a powerful Firefox add-on that gives users control over their browsing experience by intercepting HTTP and HTTPS web requests. It not only allows users to redirect or block unnecessary requests but also to throttle the responses of static resources. Further, it offers customization options to add, modify, or delete request/response headers, along with the possibility to manipulate query parameters. An excellent tool for a customized web interaction.
Add-on stats
Weekly download count: 55
Firefox on Android: No
Risk impact: High risk impact 
Risk likelihood:
Manifest version: 2
Permissions:
- tabs
- webRequest
- webRequestBlocking
- http://*/*
- https://*/*
- storage
- unlimitedStorage
Size: 1.98M
Ranking
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Not available on Android
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Add-on summary
Use this extension to
- redirect/block requests
- throttle response of static resources
- add/modify/delete request/response headers
- add/modify/delete query parameters
User reviews
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spammy, or outdated.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
- Effective for managing requests, creating controlled data scenarios
- Useful for testing feature flag behaviour when key APIs fail in a web application
- Option to partially replace URLs
Cons
- Lack of clear instructions on plugin use and enablement
- Opens settings tab each time Firefox is opened
- Has issues with auto responding and modifying request body
- Does not work on locally hosted webapps
- Throttling on localhost doesn't work
Most mentioned
- Lack of clear instructions/tutorials
- Interface could be more user-friendly
- Issues with locally hosted webapps
User reviews
A tutorial would be helpful. I can't get it to add the desired query.
by Firefox user 12604295, 2023-12-22
Add-on safety
Risk impact
Request Interceptor requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk likelihood
Request Interceptor has earned a fairly good reputation and likely can be trusted.
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