Class to enable umbraco mini profiler on every request, bit hacky and doesn't handle multiple query strings yet

DebugUrlProvider.cs

namespace YourNamespace.Core
{
    using System;
    using System.Collections.Generic;
    using Umbraco.Core.Configuration;
    using Umbraco.Core.Configuration.UmbracoSettings;
    using Umbraco.Core.Logging;
    using Umbraco.Core.Models.PublishedContent;
    using Umbraco.Web;
    using Umbraco.Web.Routing;
    using Umbraco.Core.Composing;

    public class DebugUrlProvider : DefaultUrlProvider
    {
      
        public override UrlInfo GetUrl(UmbracoContext umbracoContext, IPublishedContent content, UrlMode mode,
            string culture, Uri current)
        {
            UrlInfo defaultUrlInfo = base.GetUrl(umbracoContext, content, mode, culture, current);
            if (!defaultUrlInfo.IsUrl)
            {
                return defaultUrlInfo;
            }
            if (System.Configuration.ConfigurationManager.AppSettings["UseProfilerOnAllPages"] == "true")
            {
                var originalUrl = defaultUrlInfo.Text;
                var customUrl = $"{originalUrl}{(originalUrl.Contains("?") ? "&":"?")}umbDebug=true";
                return new UrlInfo(customUrl, true, defaultUrlInfo.Culture);
            }

            return base.GetUrl(umbracoContext, content, mode, culture, current);
        }

        public DebugUrlProvider(IRequestHandlerSection requestSettings, ILogger logger, IGlobalSettings globalSettings,
            ISiteDomainHelper siteDomainHelper) : base(requestSettings, logger, globalSettings, siteDomainHelper)
        {
        }
    }



    public class RegisterCustomUrlProviderComposer : IUserComposer
    {
        public void Compose(Composition composition)
        {
            composition.UrlProviders().Insert<DebugUrlProvider>();
        }
    }
}

web.config

 <!-- add this to your app settings -->
    <add key="UseProfilerOnAllPages" value="true" />

One suggestion, umb profiler works even if the URL has / in it... so instead of
var customUrl = originalUrl.TrimEnd('/') + "?umbDebug=true";

maybe it will work on all URLs, including query strings by just doing
var customUrl = $"{originalUrl}{(originalUrl.Contains("?"):"&":"?")}umbDebug=true";

One suggestion, umb profiler works even if the URL has / in it... so instead of
var customUrl = originalUrl.TrimEnd('/') + "?umbDebug=true";

maybe it will work on all URLs, including query strings by just doing
var customUrl = $"{originalUrl}{(originalUrl.Contains("?"):"&":"?")}umbDebug=true";

Good shout, updated it