User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0 Build ID: 20180521110957 Steps to reproduce: 1. Open Firefox 2. Go to Preferences > Home 3. Check Firefox Home (Default) 4. Open a new tab Actual results: A new empty tab is opened without activity stream Expected results: A new empty tab is opened with activity stream

Hello! Is the cog shown on new tabs? If yes, this is a different bug and any further info on this bug is appreciated. If it is just a white page, please follow these steps: 1. On a new tab, open the "about:config" (without quotes) and press the "I accept the risk!" button. 2. The Configuration page is opened. Using the search box on the top of the page, search for the "browser.newtabpage.enabled" variable. 3. Double-click the value until the Value column shows "true". 4. Restart and check if the bug exists. If it works, please check and give additional info to this bug: Bug 1460963 and request someone to close this bug report. If it isn't, report it on this bug and we will look at it.

Hi Gacel, Thank you for looking into it. I have browser.newtabpage.enabled set to true and browser.library.activity-stream.enabled set to true. I still see just a white page (the only one element on the page is Firefox logo in top left corner)

Refreshing Firefox, as it was suggested in the linked ticket, resolved the issue

(In reply to Yauhen Shulitski from comment #3) > Refreshing Firefox, as it was suggested in the linked ticket, resolved the > issue You're welcome!

Was browser.newtabpage.enabled already set to true or did you need to change it to true?

It was already set to true

(In reply to Yauhen Shulitski from comment #2) > (the only one element on the page is Firefox logo in top left > corner) If it means the top-left part of the page (and not the favicon), that might be a quirky bug. Yauhen, is the Firefox logo grey or coloured?

I believe it was grey. Also what I noticed is that the configuration page didn't have Firefox Home Content section. Only New Windows and Tabs section was presented

Firefox Home Content section was not presented

The situation sounds like activity stream never got initialized to render the page or to render the preferences. There had been some extension sandboxing issues in the past that prevented the loading of the extension on Linux, but that was fixed in bug 1384240. You wouldn't happen to still have the broken profile to see if there were errors that appeared in the Tools -> Web Developer -> Browser Console?

ahhh.. unfortunately, I don't have it anymore. I think it was removed during the Refresh process. When I visited about:newtab with open console, there was only one message: Navigated to jar:file:///home/jsn/app/firefox/browser/features/activity-stream@mozilla.org.xpi!/chrome/content/prerendered/en-US/activity-stream.html