Temporary add-on's content script isn't showing up in tabs

Even a basic console.log("CONSOLE SCRIPT STARTED") doesn’t show up. I think I’ve got the permissions right in manifest.json, posted them below this. My background script shows up fine in the toolbox extension debugger. Maybe I’m just looking the the wrong place? A console script’s output is supposed to show up in the tab debuggers, right? I already checked the “Enable browser chrome and add-on debugging toolboxes” in the toolbox settings. Also the content scripts for installed extensions show up fine so it’s probably not that.

"content scripts": [
    "matches": ["<all_urls>"],
    "script": ["scraper.js"]
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