--- a/browser/components/preferences/advanced.xul
+++ b/browser/components/preferences/advanced.xul
@@ -215,18 +215,18 @@
              </hbox>
            </groupbox>
 
            <!-- Cache/Offline apps -->
            <groupbox id="offlineGroup">
              <caption label="&offlineStorage.label;"/>
 
              <hbox align="center">
-               <label id="useCacheBefore"
-                      accesskey="&useCacheBefore.accesskey;">&useCacheBefore.label;</label>
+               <label id="useCacheBefore" control="cacheSize"
+                      accesskey="&useCacheBefore.accesskey;" value="&useCacheBefore.label;"/>
                <textbox id="cacheSize" type="number" size="2"
                         preference="browser.cache.disk.capacity"
                         onsyncfrompreference="return gAdvancedPane.readCacheSize();"
                         onsynctopreference="return gAdvancedPane.writeCacheSize();"
                         aria-labelledby="useCacheBefore cacheSize useCacheAfter"/>
                <label id="useCacheAfter" flex="1">&useCacheAfter.label;</label>
                <button id="clearCacheButton" icon="clear"
                        label="&clearCacheNow.label;" accesskey="&clearCacheNow.accesskey;"