Keep webextension api in its own bundle and therefore rework ephy-webextension cb handling.
Fixes: #1449 (closed) Fixes: #1448 (closed) Fixes: #1442 (closed)
Keep webextension api in its own bundle and therefore rework ephy-webextension cb handling.
Fixes: #1449 (closed) Fixes: #1448 (closed) Fixes: #1442 (closed)