# webRequest.onCompleted issue with FF57

**URL:** https://discourse.mozilla.org/t/webrequest-oncompleted-issue-with-ff57/22040
**Category:** Development
**Created:** [November 18, 2017, 7:22pm UTC](https://discourse.mozilla.org/t/webrequest-oncompleted-issue-with-ff57/22040 "2017-11-18T19:22:22Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![eazy-f](https://avatars.discourse-cdn.com/v4/letter/e/f1d935/32.png) [@eazy-f](https://discourse.mozilla.org/u/eazy-f)
#### Post date: [November 18, 2017, 7:22pm UTC](https://discourse.mozilla.org/t/webrequest-oncompleted-issue-with-ff57/22040/1 "2017-11-18T19:22:22Z")

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Hi there, I noticed an issue with my extension after upgrade to FF57. Basically it uses a callback on webRequest.onCompleted to track the status codes of responses and in case of errors communicate them to page\_action to notify the user. The callback placed in background script. Until the upgrade all the requests from a tab to the tab’s url has been reported with details.tabId correctly set to the actual tab’s identifier. After the upgrade all values I see details.tabId are “-1”.

The documentation states, that “-1” is set for requests which are not related to any tab, but in this case I have “-1” for the HTTP requests to the urls from the url bar and I can hardly see how they can be not related to a tab.

I this change something expected and I should a different approach to connect a request to a tab id (like url matching), or this is simply a bug?