Blocked iframes are not collapsed on Firefox

[Yuki2718]

Please answer the following questions for yourself before submitting an issue

• Filters were updated before reproducing an issue
• I checked the knowledge base and found no answer
• I checked to make sure that this issue has not already been filed

AdGuard Extension version

4.4.49

Browser version

134.0.2

OS version

Windows 11

Ad Blocking

AdGuard Base filter

Privacy

No response

Social

No response

Annoyances

AdGuard Widgets filter

Security

No response

Other

No response

Language-specific

AdGuard Japanese filter

What Tracking protection options do you have enabled?

No response

Issue Details

Steps to reproduce:

1. Do not enable AdGuard Widget filter, but add only ||blog.livedoor.jp/misopan_news/headline$subdocument,~third-party
2. Visit http://blog.livedoor.jp/misopan_news/archives/52316764.html
3. See the corresponding iframes are not collapsed as reported in blog.livedoor.jp AdguardFilters#189518 (comment)

Expected Behavior

Blocked iframes should be collapsed as with the case for theChrome extension.

Actual Behavior

Not

Screenshots

Screenshot 1

Additional Information

No response