diff --git a/browser/extensions/e10srollout/bootstrap.js b/browser/extensions/e10srollout/bootstrap.js
index 1ec32a0ed989ad4ee91e5f170602b03d3928f093..7da0c6fcb90ee0618f82ebee6de95fa9bac46117 100644
--- a/browser/extensions/e10srollout/bootstrap.js
+++ b/browser/extensions/e10srollout/bootstrap.js
@@ -21,7 +21,7 @@ const TEST_THRESHOLD = {
 // If a user qualifies for the e10s-multi experiement, this is how many
 // content processes to use and whether to allow addons for the experiment.
 const MULTI_EXPERIMENT = {
-  "beta": { buckets: { 1: .5, 4: 1, }, // 1 process: 50%, 4 processes: 50%
+  "beta": { buckets: { 4: 1, }, // 4 processes: 100%
 
             // When on the "beta" channel, getAddonsDisqualifyForMulti
             // will return true if any addon installed is not a web extension.
diff --git a/browser/extensions/e10srollout/install.rdf.in b/browser/extensions/e10srollout/install.rdf.in
index 77861c9bf5314037432dd1dd3030cd15b7c731f0..2aa675bd41a6f74233fcb6fd6317791c1fc5af00 100644
--- a/browser/extensions/e10srollout/install.rdf.in
+++ b/browser/extensions/e10srollout/install.rdf.in
@@ -10,7 +10,7 @@
 
   <Description about="urn:mozilla:install-manifest">
     <em:id>e10srollout@mozilla.org</em:id>
-    <em:version>2.1</em:version>
+    <em:version>2.15</em:version>
     <em:type>2</em:type>
     <em:bootstrap>true</em:bootstrap>
     <em:multiprocessCompatible>true</em:multiprocessCompatible>