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Convert privileged scripts and component entry points to ES modules for Gecko ESR153. Route hosted frame, prompt, permission, selection, search, and media work through current actor APIs. Preserve tab identity for downloads and harden native select handling. Adapt XPCOM services, login storage, session history, media-device handling, and user-agent update paths to current APIs. Raise the runtime bridge requirements and keep the compatibility frame script idempotent. Co-authored-by: Sebastian Matkovich <38816871+smatkovi@users.noreply.github.com>
Hosted tabs are not present in the legacy per-window table. Use their BrowsingContext when choosing the request User-Agent. Honor an explicit override first, then the hosted desktop viewport state.
Modern about: protocol security rejects remote pages unless their module flags explicitly allow child-process loading. Match Gecko's per-page flags, implement getChromeURI(), and preserve the principal of external redirects.
Keep only scripts used by hosted remote chrome and route content work through standard parent actors. Remove helpers that depended on the deleted local EmbedLite view backend. Update remaining DOM type checks and the speculative-connect call for current Gecko APIs, and simplify the system-link installation list.
Handle indexed confirmEx responses and native select menus in the parent actor. Fail malformed indices and cancellations closed instead of applying an invalid choice.
Register a window actor for hosted network and certificate error documents. Inject the mobile viewport and EmbedLite stylesheet without relying on the removed local-view helper.
Handle Gecko's cancellation observer hook and keep active downloads when the browser exits. EmbedLite owns download lifecycle and does not expose Gecko's cancellation prompt.
Track camera and microphone capture per content window and aggregate it across content processes. Publish changes through the process actor so browser chrome can keep the display awake only while video capture is active.
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Clear the threshold previously saved by WebView when the Gecko default becomes 0.06 inches. Run from the existing profile-startup hook so each embedding application's profile adopts the new default independently. Persist a migration marker so later user changes are preserved. The old automatic override has no provenance marker, so an existing manual override is also cleared by this one-time migration. Pair this with removal of WebView's first-run assignment to prevent new overrides.
Use unique request IDs so replies cannot reach a different document after navigation or a process switch, or a recreated helper after BFCache restoration. Match select responses and cancellation by ID, and remove aborted response listeners. Cover stale replies across helper recreation. Keep document-actor hit testing within its own frame; the actor bridge handles remote-frame routing and coordinate conversion.
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