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a computer kept from an older image runs the box extension's new background script, so the page's focus is reported there too #39

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Merged
hexuria merged 1 commit into from
Oct 10, 2026
Merged

a computer kept from an older image runs the box extension's new background script, so the page's focus is reported there too #39

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21 changes: 21 additions & 0 deletions docker/entrypoint.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -208,6 +208,26 @@ start_desktop() {
record $!
}

# The box's extension runs as a service worker, and Chromium goes on running the worker script
# a profile registered first: a profile kept from an image with an older extension ran the old
# background script, and the page's focus was never reported (10 Oct 2026). A new extension
# version did not change that. So when the extension's files differ from the ones this profile
# last started with, its service workers are cleared once, before Chromium starts, and every
# worker (the extension's, and any a site had) registers anew.
refresh_extension_worker() {
local stamp="${BOX_CHROME_PROFILE}/.box-active-tab.sha256"
local now
now="$(cat /opt/box/active-tab/* | sha256sum | cut -d' ' -f1)"
if [[ -f "${stamp}" && "$(cat "${stamp}")" == "${now}" ]]; then
return
fi
if [[ -d "${BOX_CHROME_PROFILE}/Default/Service Worker" ]]; then
echo "the box extension changed; clearing the profile's service workers once"
rm -rf -- "${BOX_CHROME_PROFILE}/Default/Service Worker"
fi
printf '%s\n' "${now}" >"${stamp}"
}

start_chrome() {
local bin="" candidate w h
for candidate in chromium chromium-browser google-chrome google-chrome-stable; do
Expand All @@ -227,6 +247,7 @@ start_chrome() {
export BOX_CHROME_PROFILE="/tmp/box-chrome-profile"
mkdir -p "${BOX_CHROME_PROFILE}"
fi
refresh_extension_worker
read -r w h < <(geom_wh)
export DISPLAY="${BOX_DISPLAY}"

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