Help with add a vimium extension

[fabceolin]

I am trying to add a vimium extension, following this: https://www.brow.sh/docs/extensions/

# Start from the Browsh image
FROM browsh/browsh

# Set up environment for Firefox
USER root

# Download and install the Vimium extension
RUN apt-get update && apt-get install -y wget unzip && \
    wget -O /tmp/vimium.xpi https://addons.mozilla.org/firefox/downloads/file/4137983/vimium_ff-1.67.7.xpi && \
    mkdir -p /usr/lib/firefox/browser/extensions/ && \
    cp /tmp/vimium.xpi /usr/lib/firefox/browser/extensions/{d7742d87-e61d-4b78-b8a1-b469842139fa}.xpi && \
    mkdir -p /usr/lib/firefox-esr/browser/features/ && \
    cp /tmp/vimium.xpi /usr/lib/firefox-esr/browser/features/{d7742d87-e61d-4b78-b8a1-b469842139fa}.xpi && \
    mkdir -p /app/.config/browsh/firefox_profile/extensions/ && \
    cp /tmp/vimium.xpi /app/.config/browsh/firefox_profile/extensions/{d7742d87-e61d-4b78-b8a1-b469842139fa}.xpi && \
    mkdir -p /app/.mozilla/extensions/ && \
    cp /tmp/vimium.xpi /app/.mozilla/extensions/{d7742d87-e61d-4b78-b8a1-b469842139fa}.xpi && \
    chown -R user:user /app/.config/browsh/firefox_profile && \
    chown -R user:user /app/.mozilla && \
    apt-get remove -y wget unzip && apt-get clean
USER user

But the extension is not running. Could someone help me to debug?