I run TST with the tab bar hidden (userChrome hack) in FF 57. When I open a private browsing window, TST is not visible, requiring me to press F1 to get it back. (However, because I don't have the function keys shown on my laptop, it actually requires clicking the TST icon).
New private window contains TST sidebar.
New private window does not have any sidebar open.
I believe this is caused by a Firefox bug, https://bugzilla.mozilla.org/show_bug.cgi?id=885054. Previously, I was using a different extension that was not a sidebar. I am wondering if TST will have some kind of option to open itself on new windows, as the usability of the browser is decreased in a window with no TST and no tab bar.
+1
The firefox issue is fixed isn't ?
I should have clarified - the fix to that issue caused the sidebars not to appear in Private Browsing mode.
See also https://bugzilla.mozilla.org/show_bug.cgi?id=1268550, the follow-up of the above bug.
I close this because this is out of the range of WebExtensions-based extension.
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I should have clarified - the fix to that issue caused the sidebars not to appear in Private Browsing mode.