Verified fixed with Firefox 115.0a1 (2023-05-26) when importing form autofill history from Chrome browser an the same systems that the issue is still manifesting with an affected build (Windows 7 x64, Ubuntu 20.04 and Ubuntu 22.04). The form autofill data is almost instantly imported.
Bug 1832784 Comment 12 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
Verified fixed with Firefox 115.0a1 (2023-05-26) when importing form autofill history from Chrome browser on the same systems that the issue is still manifesting with an affected build (Windows 7 x64, Ubuntu 20.04 and Ubuntu 22.04). The form autofill data is almost instantly imported.