Is there a browser support table?

[trusktr]

Search results on search engines aren't revealing much.

[trusktr]

After some searching for externref,

• Firefox since v79 Does it need a flag?
• Chrome 78 behind a flag. Is it unflagged yet?
• Safari Tech Preview Release 121 How do we map that to a stable release version? Does it need a flag? (Does Safari have flags?)

[jryans]

The roadmap page is attempting to answer some of these questions, but I haven't verified the answers for this specific feature.

[lars-t-hansen]

After some searching for externref,

* [Firefox since v79](https://hacks.mozilla.org/2020/07/firefox-79/) Does it need a flag?

No.