diff --git a/extensions/permissions/nsPermissionManager.cpp b/extensions/permissions/nsPermissionManager.cpp
index 1a652bef4222..118a1093fdb9 100644
--- a/extensions/permissions/nsPermissionManager.cpp
+++ b/extensions/permissions/nsPermissionManager.cpp
@@ -1572,8 +1572,58 @@ nsresult nsPermissionManager::InitDB(bool aRemoveFile) {
         // fall through to the next upgrade
         MOZ_FALLTHROUGH;
 
+      // Version 10 removes appId from moz_hosts. SQLite doesn't support the
+      // dropping of columns from existing tables. We need to create a temporary
+      // table, copy the data, drop the old table, rename the new one.
       case 9: {
-        rv = mDBConn->SetSchemaVersion(HOSTS_SCHEMA_VERSION);
+        rv = mDBConn->BeginTransaction();
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        bool tableExists = false;
+        mDBConn->TableExists(NS_LITERAL_CSTRING("moz_hosts_v9"), &tableExists);
+        if (tableExists) {
+          NS_WARNING(
+              "The temporary database moz_hosts_v9 already exists, dropping "
+              "it.");
+          rv = mDBConn->ExecuteSimpleSQL(
+              NS_LITERAL_CSTRING("DROP TABLE moz_hosts_v9"));
+          NS_ENSURE_SUCCESS(rv, rv);
+        }
+
+        rv = mDBConn->ExecuteSimpleSQL(
+            NS_LITERAL_CSTRING("CREATE TABLE moz_hosts_v9 ("
+                               " id INTEGER PRIMARY KEY"
+                               ",host TEXT"
+                               ",type TEXT"
+                               ",permission INTEGER"
+                               ",expireType INTEGER"
+                               ",expireTime INTEGER"
+                               ",modificationTime INTEGER"
+                               ",isInBrowserElement INTEGER"
+                               ")"));
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
+            "INSERT INTO moz_hosts_v9 "
+            "(id, host, type, permission, expireType, "
+            "expireTime, modificationTime, isInBrowserElement) "
+            "SELECT id, host, type, permission, expireType, expireTime, "
+            "modificationTime, isInBrowserElement FROM moz_hosts WHERE appId = "
+            "0"));
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        rv = mDBConn->ExecuteSimpleSQL(
+            NS_LITERAL_CSTRING("DROP TABLE moz_hosts"));
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        rv = mDBConn->ExecuteSimpleSQL(
+            NS_LITERAL_CSTRING("ALTER TABLE moz_hosts_v9 RENAME TO moz_hosts"));
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        rv = mDBConn->SetSchemaVersion(10);
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        rv = mDBConn->CommitTransaction();
         NS_ENSURE_SUCCESS(rv, rv);
       }