Blur text that should not be blurred

[horihiro]

Describe the bug The text that doesn't match to keywords is blurred.

To Reproduce Steps to reproduce the behavior:

1. Set BLURRED as blurry keyword
2. Open the following URL
   https://jsfiddle.net/da5vfmw3/
3. See error

Expected behavior Only BLURRED is blurred and NORMAL is not blurred.

Screenshots

Environment

• OS: Windows 11 Pro
• Browser: Google Chrome 124.0.6367.119 (Official Build) (64-bit)
• Version of this extension: 0.2.3

Additional context Though only text node BLURRED should be blurred, the parent node of the text node is blurred.