diff --git a/.travis.yml b/.travis.yml
index cd3497864..5f15a9782 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ env:
   matrix:
   - BROWSER=chromium EXT=zip
   - BROWSER=firefox EXT=xpi
+  - BROWSER=webext EXT=zip
 script: ./tools/make-${BROWSER}.sh all
 deploy:
   provider: releases