1306136 - View source tab broken after quitting fullscreen mode with custom settings "toolbar[inFullscreen] {display: none}" in userChrome.css

Status: NEW

(Toolkit :: View Source, defect, P5)

Description

[Firefox Add-on programmer]

User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0
Build ID: 20160922113459

Steps to reproduce:

Firefox exits fullscreen when the mouse touches the top border of the screen. I want to turn off this "built in" firefox function. -So I edited the ...

... userChrome.css (using Notepad), and entered the following line:

toolbar[inFullscreen] {display: none}

Then I restarted the Firefox browser ...

... and to test the BUG, I
1) ran firefox
2) navigate to the page tip2.eu
3) pressed F11 (then Firefox goes to fullscreen Mode)
4) while holding CTRL I clicked the right mouse button "view source"
5) I pressed F11 (this changed the Fullscreen Mode to normal mode/resized mode)




Actual results:

When I closed the newest tab, the page "tip2.eu" disappears/vanishes completely and the page tip2.eu is "wiped out" (the shortcut CTRL+Shift+T brings back the page tip2.eu )



Expected results:

the page "tip2.eu" shouldn't disappear.

-Here is my german thread:
https://www.camp-firefox.de/forum/viewtopic.php?f=4&t=118586

Comment 1

[Loic]

It's an issue with fullscreen mode and source-view in tab.

Comment 2

[Loic]

Attachment: screenshot-viewsource.png

Comment 3

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

Hmm, that's a surprising outcome!  I would say for now this will be low priority since it involves specific userChrome.css customizations to encounter the issue.  Thanks for the report!

Comment 4

[Firefox Add-on programmer]

Here is another sample to test the Bug:

1) run firefox (and navigate to a website, eg. bugzilla.mozilla.org)
2) press F11 (then Firefox goes to fullscreen Mode)
3) press windows key+D (now the Windows desktop is visible)
4) using the right mouse button click a local *.pdf file, then "SendTo-> Firefox" or: "Open with-> Firefox"
5) press F11 again (this resizes the fullscreen Mode to normal mode)

Actual result:
1) the newest tab in Firefox has no caption (normally the caption should be the pdf title!)
2) when closing the newest tab, the page in 1st tab disappears/vanishes completely (use CTRL+Shift+T to bring back the 1st tab)

screenshot :
http://fs5.directupload.net/images/161007/qauicunz.jpg