[BUG] Exclusionary rules to the Injection blacklist settings are ignored

Sequence of actions:

1. Set the following Injection blacklists under the Blacklist settings:

file://*/*
@exclude-match file://*/*.webm

2. Install the following userscript:

https://github.com/WhatIsThisImNotGoodWithComputers/webm-looper-userscript/raw/master/webm-looper.user.js

3. Open a local WebM file in the browser (e.g., file:///home/user/Downloads/sample.webm).

Problem:

Our userscript fails to execute indicating that our exclusionary rule was ignored. When clicking the greyed out Violentmonkey extension icon on the page that our WebM is playing in, the following message is displayed:

Blacklisted in Violentmonkey's settings
file://*/*

I tried these other following exclusionary rules which produced the same result:

@exclude file://*/*.webm
@exclude-match *://*/*.webm
@exclude *://*/*.webm

Expected result:

Our userscript should execute due to the inclusion of the @exclude-match rule.

Devtools console contents:

Environment:

• OS: Debian GNU/Linux 12 (bookworm) x86_64
• Browser: Mozilla Firefox 142.0 (64-bit)
• Violentmonkey Version: 2.31.0

使用本地 WebM 文件和链接的 userscript 在 Firefox 中复现报告的 blacklist 设置。检查 blacklist 和排除匹配的入口点；完成的标准是，排除规则允许 userscript 在匹配的 WebM URL 上运行，同时更广泛的 file:// blacklist 仍会阻止其他 URL。