Should I worry about this warning? Warning: This API has not been implemented by Firefox

Add-ons
#1

###New Add-ons Developer
I have done my add-on and testing with Firefox developer edition without any problem. However, during the validation process, it show me this.

addons-warning.png995×295 22.6 KB

I am able to use contextMenus in my firefox, but I’m getting this warning. Should I worry about it will not pass the review process? Please tell me and how can I get rid of this in the future. Thank you very much.
#####from new add-on developer

#2

May be a false warning, see also: https://github.com/mozilla/amo-validator/issues/554.

#3

I am wondering it too. Because the documentation stated that it is support by Chrome, Edge and Firefox 48 onwards. Even tested on normal Firefox browser without problem.

#4

It is a false warning (started since Thursday’s update). They are supported, don’t worry.

#5

Thanks for clarification!