3.5.33

* Add an explicit choice to open new child tabs at the position next to the recently opened child or the opener parent tab, like Firefox does with the preference `browser.tabs.insertRelatedAfterCurrent`=`true`.
* Add an expert option to insert new child tabs at the top or the end, when they are dropped onto a parent.
* Add some expert options to configure checkbox status of group tabs created for each context.
* Simulate Firefox's focus control behavior like the combination `browser.tabs.insertRelatedAfterCurrent`=`true` and `browser.tabs.selectOwnerOnClose`=`true` more correctly. (On old versions the parent tab was unexpectedly became the successor of a closed child tab even after manual focus changes.)
* More stabilize behaviors around auto-grouping of tabs opened from a pinned tab.
* Don't reload tab inifinitely when a URL is loaded on a group tab (it was originally reported as the [bug 1671500](https://bugzilla.mozilla.org/show_bug.cgi?id=1671500).)
* Update `ru` locale by [wvxwxvw](https://github.com/wvxwxvw). Thanks!