I’ve personally played through a campaign as Germany on the browser version and did not encounter any crashes. But I understand that crashes can occur in your playthrough and not in mine.
When the game crashes on Windows, it generates a report that you can copy and paste here. You can see a previous post below from Fantofire, where they pasted the report and I was able to fix the bug within an hour.
Unfortunately, this is not available in the browser-based version, which is a limitation of running the game in a browser.
This is why I primarily recommend and support the Windows version for troubleshooting and stability. If you experience similar issues on the Windows version, please share the report, and I’ll be able to help.
Thank you for your understanding!