Extensions that are no longer supported due to MV3 manifest (such as uBlock Origin or AutoplayStopper) are already being disabled in Chrome Canary for some users, there is a button to remove them and another to find alternatives:
You can also temporarily re-enable them, but this option will...
Edge will have a new AI-powered video translation feature, and apparently it will be possible to choose between audio or subtitles (or both if you want):
This feature doesn't work yet, not even in Canary.
This is Chrome's new "Help me write" (or "Compose") feature:
Google started working on this feature four months ago and it was officially announced a month ago.
Edge has had a similar feature for quite some time.
Chrome will have an option to switch between Light and Dark themes:
Currently the browser theme is tied to the OS theme (if you use the dark theme in the OS, Chrome also uses the dark theme).
In Chrome Canary Google has added a new toggle on the Settings page that allows you to enable or disable tab previews (the images that appear under the hover cards):
In case you didn't know, Edge has a similar option:
This is the new section on the Settings page where you will be able to set the time before a tab is discarded (it's available in Chrome Canary):
Original GIF.
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Bing Chat will also be integrated into Edge's PDF reader:
Original GIF.
This is being tested in the Canary version (controlled rollout) and, as you can see in the GIF, it still doesn't work.