[wp-trac] [WordPress Trac] #40983: TinyMCE Tabs Missing in IE10 and Down

[WordPress Trac]

#40983: TinyMCE Tabs Missing in IE10 and Down
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 Reporter:  Howdy_McGee                          |      Owner:
     Type:  defect (bug)                         |     Status:  new
 Priority:  normal                               |  Milestone:  Awaiting
Component:  TinyMCE                              |  Review
 Severity:  normal                               |    Version:  4.8
  Focuses:  ui, accessibility, javascript,       |   Keywords:
  administration                                 |
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 In Internet Explorer 9 and Internet Explorer 10 ( emulated ), both the
 Text Tab and Visual Tab are missing. This appears to happen on a normal
 installation, no plugins, Twenty Seventeen installed, but it appears to be
 happening throughout all my environments. Now, Microsoft has declared that
 they are dropping support for these browser versions early last year so
 I'm unsure if this change is intentional or not.

 The only console errors refer to Dashicons, but these errors also appear
 in IE11 and the TinyMCE has no issues there. The errors state:


 {{{
 CSS3114: @font-face unable to load invalid OpenType font.
 dashicons.eot

 CSS3119: No fonts available for @font-face rule
 load-styles.php (0,36)
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/40983>
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