Tiddlyfox 2.0.1 is confused about whether files are open

[tfeb]

It says This TiddlyWiki file is already loaded into a different tab and puts a huge, and really annoying red bar at the top of the page. The file is not open in a different tab, and the bar is really annoying.

It also won't allow you to turn on saving for the TW it thinks is open in a duplicate tab which is not just annoying, but a catastrophe.

I am running FF 52.0.2 on OSX.

[tfeb]

I've gone back to the working one, although I'd be willing to try new ones. It looks to me as if there must be some botch when it tries to enumerate tabs.

Note I have two TW5 instances open usually, in different directories, as well as a bunch of read-only) TW2 instances. I generally have two Firefox windows open.

[tfeb]

OK, I have solved this and it's not TiddlyFox's fault of course. The problem turns out to be that I had been using the 'Tab Groups' plugin that was the inheritor of the old FF tab groups facility (which I have not really forgiven Mozilla for getting rid of). Tab Groups is no longer supported because of the imminent Firefox extension dooming, so I stopped using it. But if you do this you can end up with a bunch of tabs which exist in some sense but which you can never see -- these are the tabs that were open in groups other than the current group when you uninstalled the plugin. And one of these, of course, was a duplicate of one of my TWs. So TiddlyFix was right: there was a duplicate, it just only existed in fairyland.

The way of fixing this is

• remember what tabs you have open (bookmark them?)
• unpin any pinned tabs;
• close all tabs, one by one, during which process the fairyland tabs will reappear and need to be closed (this is the critical step & it is not enough just to close the window, you have to close each tab one at a time to give the fairy ones time to reappear);
• upgrade to the new TiddlyFox;
• restore & pin tabs you want;
• curse the Mozilla people once more for repeatedly making the tools on which you rely obsolete.