You are unlikely to manage to fix the glass jar to a good enough standard where possible glass chips are not going to happen. Due to the glass pieces being difficult to spot and the danger it poses if ingested, a better idea might be to replace the jar.
Broken or cracked glass jars are no longer food safe. The glass jar is at risk of further chipping and dispersing shards into the food. This will result in injuries or worse.
If it's glass, yes; if it's plastic, no.
Yes, as long as there is enough room left in the jar for the food to expand as it freezes. If not, the jar will break.
A glass jar.
Since glass isn't a conductor, a glass jar is an insulator.
The glass jar.
Any glass jar is safe to use for canning purposes. The jar should be submerged in boiling water to disinfect it prior to use. Use new rubber sealing rings always.
It would be safe only if it was properly processed. Just sticking any old food into a jar and then closing it would not make it safe.
Pu,mpkin shape glass jar
You can buy organic yellow mustard in a glass jar at tropicaltraditions.com
The book entitled "The Glass Jar" by Janice Reed Romack was written in 1995.
Food may be canned in glass jars or metal containers, insignificant scratches in glass may cause cracking and breakage while processing jars in a canner.
Breaking a glass jar changes the physical form of the glass without changing its chemical composition.