[tor-bugs] #18860 [Applications/Tor Browser]: Text on reply button in Trac is not visible on Linux

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#18860: Text on reply button in Trac is not visible on Linux
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 Reporter:  gk                                   |          Owner:  tbb-
     Type:  defect                               |  team
 Priority:  Medium                               |         Status:
Component:  Applications/Tor Browser             |  needs_information
 Severity:  Normal                               |      Milestone:
 Keywords:  ff45-esr, tbb-usability, tbb-        |        Version:
  fingerprinting-fonts, tbb-regression,          |     Resolution:
  TorBrowserTeam201606                           |  Actual Points:
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by gk):

 Replying to [comment:6 arthuredelstein]:
 > If I "inspect" the "Reply" button it and look at `font-family` under the
 Computed (style) tab, it says
 > {{{
 > input[type="submit"]> -moz-use-system-font
 > }}}
 > and indicates that this style setting comes from `resource://gre-
 resources/forms.css`. Interestingly, this `font-family` setting overrides
 one provided by tor.css (in the pagxfce4
 > On my (Ubuntu/xfce4) system, the "Reply" text is visible, however. The
 "Fonts" tab indicates that it is rendered in Cousine, which is bundled
 with Tor Browser. Georg, what OS/desktop did you see this problem?

 On several different ones, e.g. on an Ubuntu 14.04 with GNOME or an Debian
 testing system with XFCE. Would it help if I set some debugging env vars
 to see what is going on within the font code in Tor Browser to debug this?
 If so, what would help here?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18860#comment:7>
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