Every plugin iframe loaded /plugin-sandbox, a force-dynamic Next page.
Each frame then fetched, parsed and hydrated Next's client router on top
of React and the runtime, and the server rendered the page once per
frame, one after another when a dozen plugins started together.
Sandboxed frames have opaque origins, so the browser's code cache never
helps, and they run on the host page's main thread: with 12 plugins
the frames took 2.5-3 s to come up after the app had loaded.
The sandbox routes now return a small HTML page with the UI kit's
stylesheet and the runtime as an ES module, both built ahead of time:
- `scripts/build-plugin-sandbox.mjs` bundles the runtime with esbuild
and compiles `plugin-kit.css` with the app's Tailwind setup into
`public/plugin-sandbox-assets/`, with a manifest. Named Tabler imports
are pointed at the icons' own files, so the full icon set stays in a
chunk that only loads for an icon name the kit doesn't ship.
- `npm run build`, `npm run dev`, the Dockerfile and the perf-guard
workflow run it before `next build`.
- `lib/plugin-sandbox/sandbox-document.ts` writes the page; proxy.ts
still sets the sandbox CSP and the script carries its nonce.
- The assets are served from public/ with CORS and immutable caching.
A frame on an idle page is ready in 255 ms instead of 362 ms, eleven at
once in 1.0 s instead of 2.1 s.
A new feature gate, tagsAboveSharedEnabled (default off, so the sidebar
keeps its order), lists the Tags section above the shared mailboxes
instead of below them. With many shared mailboxes expanded, the tags
otherwise end up out of sight. In Mountain View the tags then follow the
Labels list directly, also when More is open.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The admin drew its own copy of the rail, with a logo and only the app
links, next to a sidebar that signed out from its footer. It now renders
the webmail's NavigationRail (desktop and phone), which needs the
translation, theme and tour providers under /admin, so the admin layout
loads the message catalog itself; the rail marks Admin as the current
app for password admins too. The sidebar footer carries the admin
session links and the same about footer as the settings. Plugin and
theme rows and the detail header show the extension's icon from the
directory listing instead of a generic one, and a plugin's own settings
move to the bottom of its page, after availability, permissions and
versions.
The old panel kept its active tab in a store, so every page sat at
/admin, the sidebar duplicated the webmail rail by hand, and each page
was a stack of boxed cards with their own save buttons. Plugin settings
were only reachable through a gear icon in a row of five.
- one catch-all route for the whole panel; pages switch through
history.pushState, so `/admin/plugins/<id>`, the back button, bookmarks
and connector links all work without a route transition
- sidebar laid out like the user settings: back to mail, search over
pages and their sections, two group headings, change password and
sign out at the bottom; the phone shows a list, then the page
- pages use SettingsSection rows instead of nested cards, with one page
header, one flash message and one save bar at the bottom (Discard,
Save, Ctrl+S); the unsaved-changes prompt still guards leaving
- plugins and themes are lists of rows with a toggle each; a row opens
the extension's own page with its settings, force-on, permissions,
kept versions and removal
- overview shows stat tiles, server facts and recent activity
- old `/admin?tab=x` links redirect; the tab store is gone and the
connector registry resolves admin links to the page URL
- `NEXT_TURBOPACK_ROOT` overrides the Turbopack root so `next dev` runs
from a worktree with a junctioned node_modules
The marketplace now talks to the extension directory's v2 API only. The
detail page lists every version, previews the one picked, installs it,
and refuses a version the publisher withdrew unless the admin confirms,
or one outside the Bulwark range it supports. The listing gains sort, an
Installed view and an updates strip fed by the directory's updates check,
with notices for advisories, deprecations and suspensions.
A self-hosted directory older than 2026-10-14 has no v2 API and no
longer works with the marketplace.
Linus Rath
Jacob ZeitzandClaude Opus 5.5
Linus Rath