Perhaps it's a bug 1661485.

Must be because it's bugging me a lot.

This could be related to the Windows Taskbar preview, so maybe disable this feature for now to see if that has effect.

• Options -> General -> Tabs: [X] "Show tab previews in the Windows taskbar"
• about:config => browser.taskbar.previews.enable = false

You appear to have the German (de) language pack and the bug report mentions: Seeing this crash appear in early 80.0 reports, with a strong correlation to "de" (German) locale.

• https://support.mozilla.org/en-US/kb/about-config-editor-firefox

Thank you very much, I will try.