[Prequisites:] Obtain a copy of Firefox with the SHIELD recipe client system add-on installed. You can check about:support to ensure that you have it. Set the extensions.shield-recipe-client.dev_mode preference to true to run recipes immediately on startup. Set the extensions.shield-recipe-client.logging.level preference to 0 to enable more logging. Set the security.content.signature.root_hash preference to DB:74:CE:58:E4:F9:D0:9E:E0:42:36:BE:6C:C5:C4:F6:6A:E7:74:7D:C0:21:42:7A:03:BC:2F:57:0C:8B:9B:90. Settings for running Shield on Beta: 1. Set the preference value for extensions.systemaddon.update.url set to https://aus5.mozilla.org/update/3/SystemAddons/53.0.0/20160922113459/default/en-US/beta-sysaddon/default/default/default/update.xml 2. Go to Tools -> Developer Tools -> Web Console -> Open "Toolbox Options" from "Advanced settings" mark as checked the last 3 available check boxes. (browser chrome....; remote debugging; worker debugging) 3. Open Browser Console and run this script: Components.utils.import("resource://gre/modules/AddonManager.jsm"); AddonManagerPrivate.backgroundUpdateCheck(); 4. Set the preference value for extensions.shield-recipe-client.api_url set to https://normandy.stage.mozaws.net/api/v1 5. Set the extensions.shield-recipe-client.dev_mode preference to true to run recipes immediately on startup. 6. Set the extensions.shield-recipe-client.logging.level preference to 0 to enable more logging. STR: 1.Open admin center. (in FF) 2.Click on an existing recipe. 3.In the top right corner click on the clone. 4.Make some modifications to the recipe.(please remember what changes you did) 5.On the right bottom of the form click on Add New Recipe. Actual Results: Some parts of the page start to flicker, in my case, the flicker appeared over the parts where the changes from the initial recipe were made. Expected Result: A new recipe has been added. Note: I attached a screen recorder with the issue, the issue doesn't reproduce all the time, and not all the time it reproduces in the same way.

This issue is fixed with the new interface.