"...by adding a cookie to your browser."

May I suggest that this detail might be a little confusing, and might not even be necessary to surface to the user.
The user's login state is indeed handled using a cookie, but the cookies in this case are entirely internal to the app, and are not shared with any browser.

Hi @cmadeo @Dbrant - there has been some initial improvements and changes to messages and UI for the unregistered -> temp account user based on initial usability research (see findings and recommendations linked on T328368). One notable change is removing a lot of the jargon associated with messaging. And no doubt it may still continue to change moving forward, but it may be helpful to review the latest figma mocks that shows the various messages and UI elements added for now, and identify what could re-use the same string from web, vs need for a separate UI text for the apps.

These are fantastic, thanks for getting these done so quickly!

Can we make the Log in and Sign up the more dominant option @cmadeo. Otherwise the copy in the figma file Rita shared looks good.

Just to be clear again, because the answer has changed a few times, @RHo do you know if temp accounts will expire or did that get cut from scope?

Thanks @RHo and @Dbrant, I've updated the copy to more closely reflect the updates on AHT.

@JTannerWMF I made login and sign-up more dominant on the first onboarding screen, but in the pop-ups that a user can tap on once in the editor, how do you feel about keeping them as secondary as at that point they could lose changes they made in the editor? Happy to switch those too though if you prefer!

In T337250#8872128, @JTannerWMF wrote:

These are fantastic, thanks for getting these done so quickly!

Can we make the Log in and Sign up the more dominant option @cmadeo. Otherwise the copy in the figma file Rita shared looks good.

Just to be clear again, because the answer has changed a few times, @RHo do you know if temp accounts will expire or did that get cut from scope?

Temp accounts *do* expire, but the time period is TBC - details are in T300271. What has been cut is providing the ability for temp accounts to 'extend the expiry period', decision based partly on usability testing showing the expiry extension was not well understood and also likely to be an extreme minority of users.

Notes from @OTichonova:
Use of snack bar in edit summary is not quite right, perhaps a banner would make more sense here (similar to Talk pages)

FWIW the web version of status bar type message is T330510