diff --git a/README.md b/README.md
index 7caee8f..159f18b 100644
--- a/README.md
+++ b/README.md
@@ -82,11 +82,7 @@ A sample configuration file is available _gpass.ini.sample_
 Version Information
 -------------------
 
-Current version is 0.9. **(not compatible with 0.7)**
-
-Firefox will remove support for addons, so the gPass addon code is not supported since v0.8, please migrate to webextension.
-
-Transition from v0.7 to v0.8 : **Please update your masterkey (even with the same one) to gain a security level of your passwords's wallet.**
+Current version is 0.9.
 
 
 License
diff --git a/chrome_addon/background.js b/chrome_addon/background.js
index 2fa30c1..14a3438 100644
--- a/chrome_addon/background.js
+++ b/chrome_addon/background.js
@@ -20,7 +20,6 @@
 var browser = browser || chrome;
 var protocol_version = 4;
 var account_url = null;
-var crypto_v2_logins_size = 0;
 
 function _notification(message, data)
 {
@@ -39,24 +38,16 @@ function _notification(message, data)
     window.setTimeout(function() {browser.notifications.clear("gPass", function(){})}, 2000);
 }
 
-async function generate_request(domain, login, mkey, iv, old)
+async function generate_request(domain, login, mkey, iv)
 {
-    if (old)
-    {
-	var v = "@@" + domain + ";" + login;
-	debug("will encrypt " + v);
-	enc = encrypt_ecb(mkey, v);
-    }
-    else
-    {
-	var v = domain + ";" + login;
-	debug("will encrypt " + v);
-	while ((v.length % 16))
-	    v += "\0";
-	hash = await digest(v);
-	v += hash.slice(8, 24);
-	enc = encrypt_cbc(mkey, iv, v);
-    }
+    var v = domain + ";" + login;
+    debug("will encrypt " + v);
+    while ((v.length % 16))
+	v += "\0";
+    hash = await digest(v);
+    v += hash.slice(8, 24);
+    enc = encrypt_cbc(mkey, iv, v);
+
     return enc;
 }
 
@@ -80,35 +71,18 @@ async function ask_server(logins, domain, wdomain, mkey, sendResponse, options)
     keys = "";
     for(key_index=0, a=0; a<logins.length; a++, key_index++)
     {
-	enc = await generate_request(domain, logins[a], mkey, global_iv, 0);
+	enc = await generate_request(domain, logins[a], mkey, global_iv);
 	keys += (keys.length != 0) ? "&" : "";
 	keys += "k" + key_index + "=" + a2hex(enc);
 
 	if (wdomain != "")
 	{
-	    enc = await generate_request(wdomain, logins[a], mkey, global_iv, 0);
+	    enc = await generate_request(wdomain, logins[a], mkey, global_iv);
 	    keys += (keys.length != 0) ? "&" : "";
 	    keys += "k" + (++key_index) + "=" + a2hex(enc);
 	}
     }
 
-    crypto_v2_logins_size = key_index;
-    if (await get_preference("crypto_v1_compatible"))
-    {
-	for(a=0; a<logins.length; a++, key_index++)
-	{
-	    enc = await generate_request(domain, logins[a], mkey, global_iv, 1);
-	    keys += (keys.length != 0) ? "&" : "";
-	    keys += "k" + key_index + "=" + a2hex(enc);
-
-	    if (wdomain != "")
-	    {
-		enc = await generate_request(wdomain, logins[a], mkey, global_iv, 1);
-		keys += (keys.length != 0) ? "&" : "";
-		keys += "k" + (++key_index) + "=" + a2hex(enc);
-	    }
-	}
-    }
     debug("Keys " + keys);
 
     var gPassRequest = new XMLHttpRequest();
@@ -213,20 +187,9 @@ async function ask_server(logins, domain, wdomain, mkey, sendResponse, options)
 	if (ciphered_password != "")
 	{
 	    debug("Ciphered password : " + ciphered_password);
-	    if (matched_key >= crypto_v2_logins_size)
-		// Crypto v1
-	    {
-		clear_password = await decrypt_ecb(mkey, hex2a(ciphered_password));
-		// Remove trailing \0 and salt
-		clear_password = clear_password.replace(/\0*$/, "");
-		clear_password = clear_password.substr(0, clear_password.length-3);
-	    }
-	    else
-	    {
-		clear_password = await decrypt_cbc(mkey, global_iv, hex2a(ciphered_password));
-		clear_password = clear_password.replace(/\0*$/, "");
-		clear_password = clear_password.substr(3, clear_password.length);
-	    }
+	    clear_password = await decrypt_cbc(mkey, global_iv, hex2a(ciphered_password));
+	    clear_password = clear_password.replace(/\0*$/, "");
+	    clear_password = clear_password.substr(3, clear_password.length);
 	    debug("Clear password " + clear_password);
 	}
 	else
diff --git a/chrome_addon/options.html b/chrome_addon/options.html
index 07d56fd..c169be1 100644
--- a/chrome_addon/options.html
+++ b/chrome_addon/options.html
@@ -11,8 +11,6 @@
     <b>PBKDF2 level</b> Number of iterations used to derivate master key <input id="pbkdf2" type="number"/><br />
     <br/>
     <br/>
-    <b>Crypto v1 compatible </b> Compatible with old crypto schema (AES ECB). Use it for encrypted passwords with server <= 0.7 <input id="crypto_v1_compatible" type="checkbox"/><br />
-    <br/>
     <input type="button" id="save" value="Save"/>
 
     <script type="text/javascript" src="options.js">
diff --git a/chrome_addon/options.js b/chrome_addon/options.js
index 8936b9c..1c7122a 100644
--- a/chrome_addon/options.js
+++ b/chrome_addon/options.js
@@ -1,16 +1,14 @@
 var default_preferences = {"pbkdf2_level": 1000,
-			   "account_url": "https://gpass-demo.soutade.fr/demo",
-			   "crypto_v1_compatible": true};
+			   "account_url": "https://gpass-demo.soutade.fr/demo"
+			  };
 
 function save() {
     var account_url = document.getElementById('account_url').value;
     var pbkdf2 = document.getElementById('pbkdf2').value;
-    var crypto_v1_compatible = document.getElementById('crypto_v1_compatible').checked;
 
     chrome.storage.local.set({
 	'account_url': account_url,
 	'pbkdf2': pbkdf2,
-	'crypto_v1_compatible': crypto_v1_compatible,
     }, function() {
 	alert('Saved');
     });
@@ -27,14 +25,8 @@ chrome.storage.local.get(null, function(prefs) {
     else
 	pbkdf2 = prefs['pbkdf2_level'];
 
-    if (!prefs.hasOwnProperty("crypto_v1_compatible"))
-	crypto_v1_compatible = default_preferences['crypto_v1_compatible'];
-    else
-	crypto_v1_compatible = prefs['crypto_v1_compatible'];
-    
     document.getElementById('account_url').value = account_url;
     document.getElementById('pbkdf2').value = pbkdf2;
-    document.getElementById('crypto_v1_compatible').checked = crypto_v1_compatible;
 });
 
 document.getElementById('save').addEventListener("click", save);
diff --git a/firefox_webextension/background.js b/firefox_webextension/background.js
index 2fa30c1..14a3438 100644
--- a/firefox_webextension/background.js
+++ b/firefox_webextension/background.js
@@ -20,7 +20,6 @@
 var browser = browser || chrome;
 var protocol_version = 4;
 var account_url = null;
-var crypto_v2_logins_size = 0;
 
 function _notification(message, data)
 {
@@ -39,24 +38,16 @@ function _notification(message, data)
     window.setTimeout(function() {browser.notifications.clear("gPass", function(){})}, 2000);
 }
 
-async function generate_request(domain, login, mkey, iv, old)
+async function generate_request(domain, login, mkey, iv)
 {
-    if (old)
-    {
-	var v = "@@" + domain + ";" + login;
-	debug("will encrypt " + v);
-	enc = encrypt_ecb(mkey, v);
-    }
-    else
-    {
-	var v = domain + ";" + login;
-	debug("will encrypt " + v);
-	while ((v.length % 16))
-	    v += "\0";
-	hash = await digest(v);
-	v += hash.slice(8, 24);
-	enc = encrypt_cbc(mkey, iv, v);
-    }
+    var v = domain + ";" + login;
+    debug("will encrypt " + v);
+    while ((v.length % 16))
+	v += "\0";
+    hash = await digest(v);
+    v += hash.slice(8, 24);
+    enc = encrypt_cbc(mkey, iv, v);
+
     return enc;
 }
 
@@ -80,35 +71,18 @@ async function ask_server(logins, domain, wdomain, mkey, sendResponse, options)
     keys = "";
     for(key_index=0, a=0; a<logins.length; a++, key_index++)
     {
-	enc = await generate_request(domain, logins[a], mkey, global_iv, 0);
+	enc = await generate_request(domain, logins[a], mkey, global_iv);
 	keys += (keys.length != 0) ? "&" : "";
 	keys += "k" + key_index + "=" + a2hex(enc);
 
 	if (wdomain != "")
 	{
-	    enc = await generate_request(wdomain, logins[a], mkey, global_iv, 0);
+	    enc = await generate_request(wdomain, logins[a], mkey, global_iv);
 	    keys += (keys.length != 0) ? "&" : "";
 	    keys += "k" + (++key_index) + "=" + a2hex(enc);
 	}
     }
 
-    crypto_v2_logins_size = key_index;
-    if (await get_preference("crypto_v1_compatible"))
-    {
-	for(a=0; a<logins.length; a++, key_index++)
-	{
-	    enc = await generate_request(domain, logins[a], mkey, global_iv, 1);
-	    keys += (keys.length != 0) ? "&" : "";
-	    keys += "k" + key_index + "=" + a2hex(enc);
-
-	    if (wdomain != "")
-	    {
-		enc = await generate_request(wdomain, logins[a], mkey, global_iv, 1);
-		keys += (keys.length != 0) ? "&" : "";
-		keys += "k" + (++key_index) + "=" + a2hex(enc);
-	    }
-	}
-    }
     debug("Keys " + keys);
 
     var gPassRequest = new XMLHttpRequest();
@@ -213,20 +187,9 @@ async function ask_server(logins, domain, wdomain, mkey, sendResponse, options)
 	if (ciphered_password != "")
 	{
 	    debug("Ciphered password : " + ciphered_password);
-	    if (matched_key >= crypto_v2_logins_size)
-		// Crypto v1
-	    {
-		clear_password = await decrypt_ecb(mkey, hex2a(ciphered_password));
-		// Remove trailing \0 and salt
-		clear_password = clear_password.replace(/\0*$/, "");
-		clear_password = clear_password.substr(0, clear_password.length-3);
-	    }
-	    else
-	    {
-		clear_password = await decrypt_cbc(mkey, global_iv, hex2a(ciphered_password));
-		clear_password = clear_password.replace(/\0*$/, "");
-		clear_password = clear_password.substr(3, clear_password.length);
-	    }
+	    clear_password = await decrypt_cbc(mkey, global_iv, hex2a(ciphered_password));
+	    clear_password = clear_password.replace(/\0*$/, "");
+	    clear_password = clear_password.substr(3, clear_password.length);
 	    debug("Clear password " + clear_password);
 	}
 	else
diff --git a/firefox_webextension/options.html b/firefox_webextension/options.html
index 07d56fd..c169be1 100644
--- a/firefox_webextension/options.html
+++ b/firefox_webextension/options.html
@@ -11,8 +11,6 @@
     <b>PBKDF2 level</b> Number of iterations used to derivate master key <input id="pbkdf2" type="number"/><br />
     <br/>
     <br/>
-    <b>Crypto v1 compatible </b> Compatible with old crypto schema (AES ECB). Use it for encrypted passwords with server <= 0.7 <input id="crypto_v1_compatible" type="checkbox"/><br />
-    <br/>
     <input type="button" id="save" value="Save"/>
 
     <script type="text/javascript" src="options.js">
diff --git a/firefox_webextension/options.js b/firefox_webextension/options.js
index a4a7e4b..5a3a7e0 100644
--- a/firefox_webextension/options.js
+++ b/firefox_webextension/options.js
@@ -1,16 +1,14 @@
 var default_preferences = {"pbkdf2_level": 1000,
-			   "account_url": "https://gpass-demo.soutade.fr/demo",
-			   "crypto_v1_compatible": true};
+			   "account_url": "https://gpass-demo.soutade.fr/demo"
+			  };
 
 function save() {
     var account_url = document.getElementById('account_url').value;
     var pbkdf2 = document.getElementById('pbkdf2').value;
-    var crypto_v1_compatible = document.getElementById('crypto_v1_compatible').checked;
 
     browser.storage.local.set({
 	"account_url":account_url,
 	"pbkdf2_level":pbkdf2,
-	"crypto_v1_compatible": crypto_v1_compatible,
     })
 	.then(function ok() { alert("Saved"); },
 	      function err() { alert("Cannot save your preferences");}
@@ -21,7 +19,6 @@ function restoreOptions()
 {
     document.getElementById('account_url').value = default_preferences['account_url'];
     document.getElementById('pbkdf2').value = default_preferences['pbkdf2_level'];
-    document.getElementById('crypto_v1_compatible').checked = default_preferences["crypto_v1_compatible"];
 
     browser.storage.local.get().then(
 	function(prefs)
@@ -31,9 +28,6 @@ function restoreOptions()
 
 	    if (prefs.hasOwnProperty("pbkdf2_level"))
 		document.getElementById('pbkdf2').value = prefs["pbkdf2_level"];
-
-	    if (prefs.hasOwnProperty("crypto_v1_compatible"))
-		document.getElementById('crypto_v1_compatible').checked = prefs["crypto_v1_compatible"];
 	}
     );
 }