Describe the bug

I'm trying to forward analytics events to the background script but I get the following error

Reproduction

You can use my repo to check https://github.com/sm17p/amgiflol

Steps to reproduce

1. Clone my repo
2. Run pnpm dev:firefox

System Info

System:
    OS: macOS 15.5
    CPU: (8) arm64 Apple M2
    Memory: 79.66 MB / 16.00 GB
    Shell: 4.0.2 - /run/current-system/sw/bin/fish
  Binaries:
    Node: 24.1.0 
    npm: 11.3.0 
    pnpm: 10.12.3 
  Browsers:
    Chrome: 138.0.7204.101
    Firefox: 140.0.4
  npmPackages:
    wxt: ^0.20.6 => 0.20.7

Used Package Manager

pnpm

Validations

• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.