What Microsoft has yet to do is describe what non-security changes were made to Edge between versions 79 and 80. (Presumably, Microsoft also patched the 29 bugs for which Google did not list CVEs.)

In Microsoft's ongoing Edge security advisory, the firm reported that Edge 80.0.361.48 also included fixes for the same 37 CVEs. Ten of the 37 were marked 'High,' the second-most-serious ranking in Chrome's (and Chromium's) four-step rating system. Google listed 37 of the 56 with CVE (Common Vulnerabilities & Exposures) identifiers. 87, with new features as well as 56 security fixes. That lag turned out to be only three days. Although the narrow window between the two was encouraging, what was still unknown was the length of the lag between Google promoting a new version of Chrome to the Stable branch and Microsoft following suit. Microsoft delivered an update for the same vulnerabilities on Jan. The first Chrome security update issued after Edge's Jan. The shorter the lag, the better: Criminals could conceivably exploit a large gap by reverse engineering Chrome's fixes for that version's security vulnerabilities, then applying the results to a not-yet-patched Edge. One question that Microsoft has not addressed is how long it would take to get from Chromium to a finished version of Edge, most importantly whether there would be a lag, and if so, how long,between Google launching Chrome and Microsoft releasing Edge.

Since then, developers at both Google and Microsoft have been working on their versions of Chromium 80, each using a multi-stage cadence of Canary, Dev, Beta and then Stable builds to release progressively more reliable and polished code.

List of microsoft edge versions