diff --git a/browser/app/profile/all.js b/browser/app/profile/all.js
index 5493c264ef9..12c3906e1ea 100644
--- a/browser/app/profile/all.js
+++ b/browser/app/profile/all.js
@@ -460,7 +460,7 @@ pref("network.cookie.p3p",                  "ffffaaaa");
 pref("network.cookie.p3plevel",             1); // 0=low, 1=medium, 2=high, 3=custom
 
 pref("network.enablePad",                   false); // Allow client to do proxy autodiscovery
-pref("network.enableIDN",                   false); // Turn on/off IDN (Internationalized Domain Name) resolution
+pref("network.enableIDN",                   true); // Turn on/off IDN (Internationalized Domain Name) resolution
 pref("converter.html2txt.structs",          true); // Output structured phrases (strong, em, code, sub, sup, b, i, u)
 pref("converter.html2txt.header_strategy",  1); // 0 = no indention; 1 = indention, increased with header level; 2 = numbering and slight indention
 pref("imageblocker.enabled",                true);
diff --git a/browser/app/profile/firebird.js b/browser/app/profile/firebird.js
index 5493c264ef9..12c3906e1ea 100644
--- a/browser/app/profile/firebird.js
+++ b/browser/app/profile/firebird.js
@@ -460,7 +460,7 @@ pref("network.cookie.p3p",                  "ffffaaaa");
 pref("network.cookie.p3plevel",             1); // 0=low, 1=medium, 2=high, 3=custom
 
 pref("network.enablePad",                   false); // Allow client to do proxy autodiscovery
-pref("network.enableIDN",                   false); // Turn on/off IDN (Internationalized Domain Name) resolution
+pref("network.enableIDN",                   true); // Turn on/off IDN (Internationalized Domain Name) resolution
 pref("converter.html2txt.structs",          true); // Output structured phrases (strong, em, code, sub, sup, b, i, u)
 pref("converter.html2txt.header_strategy",  1); // 0 = no indention; 1 = indention, increased with header level; 2 = numbering and slight indention
 pref("imageblocker.enabled",                true);