This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

TypeError: this._addon is null ??

  • 1 freagra
  • 1 leis an bhfadhb seo
  • 1 view
  • Freagra is déanaí ó philipp

more options

i am working on addon for Firefox when ever i try to test it on the browser it shows this error , but it is working

A promise chain failed to handle a rejection. Did you forget to '.catch', or did you forget to 'return'? See https://developer.mozilla.org/Mozilla/JavaScript_code_modules/Promise.jsm/Promise

Date: Wed Jun 01 2016 17:42:27 GMT+0400 (GST) Full Message: TypeError: this._addon is null

any advice

i am working on addon for Firefox when ever i try to test it on the browser it shows this error , but it is working A promise chain failed to handle a rejection. Did you forget to '.catch', or did you forget to 'return'? See https://developer.mozilla.org/Mozilla/JavaScript_code_modules/Promise.jsm/Promise Date: Wed Jun 01 2016 17:42:27 GMT+0400 (GST) Full Message: TypeError: this._addon is null any advice

All Replies (1)

more options

hi nawras, support.mozilla.org is for enduser support. if you need help with addon developement you'll get better replies if you ask your question in the addons forum at https://discourse.mozilla-community.org/c/add-ons

thank you for your understanding!