This appears to be due to the Firefox snap's use of the mount-control interface for accessing system hunspell dictionaries. There is work in progress for moving away from mount-control and using a simpler and cleaner approach of using system-files for that instead, which should also alleviate this.
However, ideally snapd should handle a case like this properly, so thanks for marking this bug as affecting snapd as well.
Hello,
This appears to be due to the Firefox snap's use of the mount-control interface for accessing system hunspell dictionaries. There is work in progress for moving away from mount-control and using a simpler and cleaner approach of using system-files for that instead, which should also alleviate this.
However, ideally snapd should handle a case like this properly, so thanks for marking this bug as affecting snapd as well.