[tbb-bugs] #28836 [Applications/Tor Browser]: Links on about:tor are not clickable anymore on Windows starting with 8.5a5

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#28836: Links on about:tor are not clickable anymore on Windows starting with 8.5a5
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-regression,                      |  Actual Points:
  TorBrowserTeam201901                           |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by mcs):

 Kathy and I are working on this ticket. The problem affects all platforms
 when the window height is small. The root cause is the CSS that was added
 to always position the onion-pattern-container at the bottom of the page.
 That change causes the onion background to appear behind the links but
 also block clicking the links. We can fix this by adding `z-index: -1` to
 the CSS. We should also think about whether we want to position the onion
 background at the bottom of the page on desktop or just let it stay within
 normal flow (as it was before the changes for #27111 landed).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28836#comment:3>
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