[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

ローカルの WebM ファイルとリンクされた userscript を Firefox で使用して、報告された blacklist の設定を再現します。blacklist と除外マッチングのエントリポイントを調査します。完了の条件は、除外ルールによって一致する WebM URL で userscript が許可され、一方でより広範な file:// blacklist は引き続き他の URL をブロックすることです。