User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0 Build ID: 20130215130331 Steps to reproduce: Load page www.in.gr Actual results: It loads most of the page but never stops loading and firefox becomes slower over time. Also if you press the stop button it takes ages to stop and every action after it stops is very very slow. Note that this happens only on phones, works fine on tablets! Phones tested include previous and current generation phone eg. Sony Xperia S, Sony Xperia Z , Samsung S2, Asus TF101 . Expected results: Page to stop loading.

I can reproduce on this page as well (Galaxy Nexus, latest nightly). Profiling doesn't work.

Hello, anything new on this? Is still valid even for nightly 29a.

(In reply to George Billios from comment #0) > Sony Xperia S, Sony Xperia Z , Samsung S2, Asus TF101 . I don't have any of those phones, but I have a Galaxy S4 (Android 4.4.2) and loaded that mobile site within 3 seconds on Nightly. 01-23 10:04:19.182 I/GeckoToolbarDisplayLayout( 4399): zerdatime 968395 - Throbber start 01-23 10:04:22.625 I/GeckoToolbarDisplayLayout( 4399): zerdatime 971849 - Throbber stop

I'm pretty sure you've just rendered the mobile version of the site which is pretty simple and renders indeed very fast. In the bottom of the page there is a bar with the option to see the desktop site. Using that you'll see the problem which in nightly has become stranger. The page finally stops loading after several seconds but afterwards every action on the page is very slow, eg clicking on a link to open in another tab etc. Tested with Sony Z, Z1 and Nexus 7 2013

I see no reaction on my last post so either you are busy or not interested. In any case let me add more data to this ticket. I attach a screenshot with what you need to click on in order to see the full site and see the problems I describe.

Although I'm not able to reproduce this on my devices. On desktop (in both desktop Firefox and Chrome), I see a slow loading AJAX script that took about about ~1.7min to complete the GET request.

On my Z1 (4.3) - which by the way is certainly more powerful than the S4 - with today's nightly I certainly can't replicate your results. D/GeckoTabs(18430): handleMessage: Content:StateChange D/GeckoToolbar(18430): onTabChanged: MENU_UPDATED D/GeckoBrowserApp(18430): BrowserApp.onTabChanged: 2: MENU_UPDATED D/GeckoToolbar(18430): onTabChanged: START I/GeckoToolbarDisplayLayout(18430): zerdatime 27350758 - Throbber start D/GeckoBrowserApp(18430): BrowserApp.onTabChanged: 2: START D/GeckoTabs(18430): handleMessage: Content:LocationChange D/GeckoTab(18430): Ignoring location change event: URIs are the same. D/GeckoTabs(18430): handleMessage: Content:SecurityChange D/GeckoToolbar(18430): onTabChanged: SECURITY_CHANGE D/GeckoBrowserApp(18430): BrowserApp.onTabChanged: 2: SECURITY_CHANGE D/GeckoTabs(18430): handleMessage: DOMTitleChanged D/GeckoTabs(18430): handleMessage: Link:Favicon D/GeckoTabs(18430): handleMessage: Link:Favicon D/GeckoToolbar(18430): onTabChanged: LINK_FAVICON D/GeckoBrowserApp(18430): BrowserApp.onTabChanged: 2: LINK_FAVICON D/GeckoToolbar(18430): onTabChanged: LINK_FAVICON D/GeckoBrowserApp(18430): BrowserApp.onTabChanged: 2: LINK_FAVICON D/GeckoTabs(18430): handleMessage: Tab:ViewportMetadata D/GeckoToolbar(18430): onTabChanged: VIEWPORT_CHANGE D/GeckoBrowserApp(18430): BrowserApp.onTabChanged: 2: VIEWPORT_CHANGE E/GeckoConsole(18430): [JavaScript Warning: "Use of getAttributeNode() is deprecated. Use getAttribute() instead." {file: "http://scripts.in .gr/webstatic/js/879B67FEEBFE5A693793D3D166B7789B.js" line: 3}] E/GeckoConsole(18430): [JavaScript Warning: "Use of attributes' nodeValue attribute is deprecated. Use value instead." {file: "http://script s.in.gr/webstatic/js/879B67FEEBFE5A693793D3D166B7789B.js" line: 3}] E/GeckoConsole(18430): [JavaScript Warning: "Use of Mutation Events is deprecated. Use MutationObserver instead." {file: "http://scripts.in. gr/webstatic/js/879B67FEEBFE5A693793D3D166B7789B.js" line: 4}] D/GeckoTabs(18430): handleMessage: DOMContentLoaded D/GeckoToolbar(18430): onTabChanged: LOADED D/GeckoBrowserApp(18430): BrowserApp.onTabChanged: 2: LOADED D/GeckoTabs(18430): handleMessage: Content:PageShow D/GeckoToolbar(18430): onTabChanged: PAGE_SHOW D/GeckoBrowserApp(18430): BrowserApp.onTabChanged: 2: PAGE_SHOW D/GeckoTabs(18430): handleMessage: Content:StateChange D/GeckoToolbar(18430): onTabChanged: STOP I/GeckoToolbarDisplayLayout(18430): zerdatime 27378873 - Throbber stop D/GeckoBrowserApp(18430): BrowserApp.onTabChanged: 2: STOP I also get the same results on the Nexus 7 2013 (4.4.2), the page loads after 15 seconds. Maybe there is a way to debug this more? Regardless of how long an AJAX script takes, chrome mobile doesn't present the same behavior.

We have completed our launch of our new Firefox on Android. The development of the new versions use GitHub for issue tracking. If the bug report still reproduces in a current version of [Firefox on Android nightly](https://play.google.com/store/apps/details?id=org.mozilla.fenix) an issue can be reported at the [Fenix GitHub project](https://github.com/mozilla-mobile/fenix/). If you want to discuss your report please use [Mozilla's chat](https://wiki.mozilla.org/Matrix#Connect_to_Matrix) server https://chat.mozilla.org and join the [#fenix](https://chat.mozilla.org/#/room/#fenix:mozilla.org) channel.