Unexpected invalid url on key press in console

[m11m]

Type:

• bug
• feature
• enhancement
• question

Environment:

• OS: macOS 10.15
• Browser: Firefox 75
• Library Version: 1.1.4

I'm going to open a PR:

• yes
• no (at least not right now)

Description:
[ Write the issue description here ]
Getting red error text and stack trace whenever I open inspect on the extension and type in the console.

Unexpected invalid url: debugger eager eval codewebextension.js:351
    _allowSource resource://devtools/server/actors/targets/webextension.js:351
    <anonymous> self-hosted:875
    allowSource resource://devtools/server/actors/utils/TabSources.js:37
    _addSource resource://devtools/server/actors/thread.js:1888
    onNewScript resource://devtools/server/actors/thread.js:1859
    onNewScript self-hosted:875
    getEvalResult resource://devtools/server/actors/webconsole/eval-with-debugger.js:204
    evalWithDebugger resource://devtools/server/actors/webconsole/eval-with-debugger.js:164
    evaluateJS resource://devtools/server/actors/webconsole.js:1182
    evaluateJSAsync resource://devtools/server/actors/webconsole.js:1077
    makeInfallible resource://devtools/shared/ThreadSafeDevToolsUtils.js:111