In bug 1335365 I introduced Telemetry::MOZ_CHUNKED_TEXT_IN_XHR to count how often moz-chunked-text type is used in XHR. The result is: 0.16% I would like to proceed with removing this non-spec feature.
Created attachment 8904885 [details] [diff] [review] moz_text.patch
Created attachment 8904886 [details] [diff] [review] moz_text.patch
Comment on attachment 8904886 [details] [diff] [review] moz_text.patch Is domerr.msg ever localized? If it is, could you ask some l10n folks to approve this. (But I think it isn't localized). And if we want to be super conservative for FF57, this could perhaps land after the branch date.
Green on try: https://treeherder.mozilla.org/#/jobs?repo=try&revision=83377f20f8b02d994f47a56bc2ceb7562857f266&selectedJob=128876770 Please, land this patch when 57 is the new beta.
Created attachment 8905107 [details] [diff] [review] moz_text.patch
Created attachment 8905110 [details] [diff] [review] moz_text.patch
NI RyanVM to land this patch after 57.
Pushed by email@example.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/9fb93fcf2b8e Remove the support for moz-chunk-text type in XHR, r=smaug
Posted the site compatibility note: https://www.fxsitecompat.com/en-CA/docs/2017/prefixed-xmlhttprequest-response-types-including-moz-blob-are-no-longer-supported/
I have documented this, by adding a note to the responseType page and removing the information about those values: https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/responseType#Browser_compatibility And by adding a note to the Fx58 rel notes: https://developer.mozilla.org/en-US/Firefox/Releases/58#APIs_2 Let me know if that looks OK. Thanks!