Canon
Our responsa on the matter of the cannon is written by Dr J S Trimm of Beit Netzarim in Dallas TX USA.
Thoughts on the Canon
James Trimm
Now some thoughts regarding the books known as "Apocrypha" (minus those that are actually variant additions to Ester, Daniel and Psalmas
1Esdras
2Esdras
Tobit
Judith
Wisdom of Solomon
Ben Sirach
Baruch
Letter of Jeremiah
Prayer of Manasseh
1Maccabees
2Maccabees
3Maccabees
4Maccabees
These books are quoted by the earliest "Church Fathers" as "Scripture" and appear to have been accepted by the earliest "Christians". All but 2Esdras were in the canon of the LXX and 2Esdras was in the canon of the Vulgate.
They are regarded as canon by all the churches with ancient roots:
Roman Catholics
Eastern Orthodox
Church of the East
Syrian Orthodox Church
Ethiopic Church
And are, in Christendom, not rejected until protestantism arises. This aparantly under the influence of Rabbinic Judaism.
However Rabbinic Judaism (which did not include them in the Masoretic Text Canon) did not settle its canon until someime after the Talmud was written.
For example the Talmud three times quotes Ben Sirach as "Scripture" while also recording debates as to the canonicisty of books like Ester, Ruth, Song of Solomon, Eccl. and others.
I have previously noted elsewhere the PaRDeS pattern that we find in the four Gospels* is also found in parts of the Apocrypha:
1Macc. Pashat
2Macc. Remez
3Macc. Drash
4Macc. Sod
also if we accept Wisdom of Solomon then there are four books of Solomon as follows:
Eccl. gives PASHAT
Prov. gives Remez
Song gives DRASH
Wisdom gives SOD
Finally there are MANY strong references to the contents of the Apocrypha in the books of the NT.
My thoughts overall on canon
I personally do not think Jasher was meant to be canon but to be a valubale resource, sort of a really ancient Josephus.
I think an argument can be made for the canonicity of the 13 books of the apocrypha and 1st Enoch as well as the Gospel according to the Hebrews.
I think a person should be abe to accept or reject any of these 16 books and still be in good standing.