dorpdown menu flicker in firefox web extensions.

[LryBackinblack]

• I have searched the issues of this repository and believe that this is not a duplicate.

Version

1.3.14

Environment

Firefox 68.0.2 vue2.6.10 win10

Reproduction link

https://www.antdv.com/components/select-cn/

Steps to reproduce

example:

Large Default Small

What is expected?

What is actually happening?

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.