Google this week released Chrome 80, beginning a promised process of locking down cookies and at the same time patching 56 vulnerabilities.
The California company paid at least $48,000 in bug bounties to researchers who reported some of the vulnerabilities. Ten were tagged as “High,” the second-most serious in Google’s four-step threat ranking. Half of those 10 were submitted by engineers of Google’s own Project Zero team.
Chrome updates in the background, so most users can simply relaunch the browser to finish the upgrade. To manually update, select “About Google Chrome” from the Help menu under the vertical ellipsis at the upper right; the resulting tab shows that the browser has been updated or displays the download process before presenting a “Relaunch” button. Those who are new to Chrome can download the latest for Windows, macOS and Linux here.
Google updates Chrome every six to eight weeks. It last upgraded the browser on Dec. 10, 2019.
Enforcement of cookie-control starts now
Last year, Google said it would clamp down on cookies – the small bits of code websites rely on to, among other things, identify individual users – using the SameSite standard. SameSite, which has also been pushed by Mozilla and Microsoft, was designed to give web developers a way to control which cookies can be sent by a browser and under what conditions.
With Chrome 80, Google will begin enforcing SameSite, said Barb Smith, a Google executive, in a Feb. 4 post to the Chromium blog. Cookies distributed from a third-party source – in other words, not by the site the user is at – must be correctly set and accessed only over secure connections.
“Enforcement of the new cookie classification system in Chrome 80 will begin later in February with a small population of users, gradually increasing over time,” Smith wrote. Google frequently rolls out new features and other changes in stages, letting it verify that things worked as expected before expanding the pool of users. The company has set the week of Feb. 17 as the opening switch-on-SameSite salvo.
Also, as of Chrome 80, cookies without a SameSite definition will be considered as first-party only by default; third-party cookies – say, those from an external ad distributor tracking users as they wander the web – won’t be sent.
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