It seems only Chrome supports IsSearchProviderInstalled method. IE8+ and Firefox always return 0.
Is there any reason for deprecating IsSearchProviderInstalled method in IE8+?
Is there any alternative? I want to remove add button if my search provider is already installed.
Also is there any alternative for this IE/Firefox method in Opera Browser?
window.external.AddSearchProvider('opensearch.xml')
Opera has its own way to add search provider. Is there any way to add a search provider to it using JS?
See: http://msdn.microsoft.com/en-us/library/aa342526(v=vs.85).aspx
Also see:https://bugzilla.mozilla.org/show_bug.cgi?id=340604
