First of all, many thanks for this great extension, I was happily using it for more than a year now (with PAC file based configuration, see below)!
Unfortunately I ran into problems lately ...

For me it is hard to detect which configuration is active and how to select the proper one.
I understand that the currently selected configuration option is shown by the color of the proxy icon in the toolbar, e.g.,

But for some reason it seems to change arbitrarily, e.g., from PAC script to manual proxy configuration.
I was thinking that the last selected configuration in the tab is used until I change it?

Final question would be how I can activate PAC scripts by local URL? Next to the Configuration there are three icons where I have no idea of the semantics:

What does the

• Reload Button mean: Do I have to press it every time I change the file on the disk?
• X-Button mean: Can I cancel something, what?
• Check-Button mean: Do I have to confirm my settings/filename changes or what?

Playing around with them didn't help very much.

For PAC-Scripts: The only thing that always works, is to copy/paste my script from the file to the inline section. However I would appreciate to maintain my changes in a file which is subject to version control.

For completeness: I use v0.6.0 on the latest Brave browser (Chrome engine with more privacy).