We are developing our application with a lot of javascript code ( we use AngularJS, JQuery, Kendo etc ... ). We had some cross browser issues but were able to work around them. However, there is one problem we are not able to fix : some of our iframes don't load in Firefox. The following (relative ) url opens correctly : ifLookupC.html?pageGuidLookup=1469350009119 The following shows blank : ?menu=none#view/qraview/maint?viewMetaUri=urn:view:meta:com.qad.erp.sales.itemReplacements&qraViewId=Maint&domainCode=10USA&documentType=1&documentNumber=%3C%2FCENT&replacementType=30&itemCode=01010&siteCode=10-100&quantityOrdered=8000 It works fine in Chrome, IE, Edge and Safari. The url works if it's not in an IFrame, and I should note that we have the problem with an IFrame in and Iframe. Regards, Stefan Brands.