I removed the code that creates the EphyWebOverview by mistake in a previous patch.
9ba4f00 web-extension: Make the overview work again
embed/web-extension/ephy-web-extension.c | 16 ++++++++++++
embed/web-extension/ephy-web-overview.c | 39 ------------------------------
2 files changed, 16 insertions(+), 39 deletions(-)
Upstream: git.gnome.org