Canonical link have slash at the end...

Hello

as said this is an issue, it does not have any bad effect
no bad effect because both

domain
and
domain/

point to rel-canonical
domain/

But there is a further reason that this is not an issue
google will treat homepages the same regardless if the have a slash or not
that is because homepage is always a "directory" like URL

Hello!

You wrote

indeed it is best to remove
and should be trivial (very easy) too, doing it

So, I was waiting.

Hello

Removed it with this commit
github.com/FLEXIcontent/flexicontent-cck...312015c43d5cc980a063

but it should not make any difference for search-engines,
as the treat home pages with and without trailings slash as the same URL ...

Hello.
I'm really sorry.
Is it possible to add same for base href?

So all home urls will be same, without slash.

I know, it looks like paranoia or as a manifestation of perfectionism, but when we developing something for a long time and the competition goes off scale - we need to make perfect product.

Hello

it is not possible to change it without creating problems

it is created by
and both Joomla and FLEXIContent and other extension code depend on the way it is created

if we remove the slash from base URL
then URLs like these will break

so changing the way it is created is not an option