It was updated automatically for me, both on Firefox desktop and Firefox for Android.

Still stuck on the previous version. The store shows 1.20, but even switching to "developer mode" in the Chrome extension overview and clicking on "Update" (button) and restarting the browser had no effect. Still the old version.

Update to my question: Someone wrote this blog post about this exact problem, even with this exact extension (dated September 25, 2018), and how to manually update the extension: https://www.ghacks.net/2018/09/25/how-to-update-chrome-exten...

UPDATE

After reading the comments on the linked blog article, frantically hitting the "Update" button (in developer mode) many times indeed helps! I had clicked it quite a few times already, but "normally", going crazy and hitting it a lot and quickly indeed lead to the update occurring.

Wow, what a crazy user interface that requires users to go berserk on the buttons...

Same here. Why won't it update to the new version?

"I see some Chrome/Chromium users wondering why they are not updated to uBlock Origin 1.17.0:

When I publish a new version of uBO, I deploy gradually, starting with 5% of users then increasing every day: 12%, 25%, 50%, 100%."

https://twitter.com/gorhill/status/1044670065889734657

Good to know. Thanks.