Separate instance for one write work task

Writer 25.2.7.latest
Writing work characteristic
one template + derived documents
master + subdocuments (about 10 of latter ones)
External app extension for reference management and citations; app uses reference fields to place citations in document.
styles (paragraph, character, page) are managed in template
template delivers practically no content to documents
all subs open at the same time
master consolidates subs, delivers TOC, indices, bibliography list (latter one added to document by external app extension)
Right now master document processed at the same time.
LO installed from Linux distribution package management, not sandboxed
Working only in Writer interactive sessions unless Writer spawns some background session when I use some of its functionalities (e.g. print preview - no idea if this really applies).
Document language doesn’t equal English.

Due to problems with stability of Writer (crashes) I am on the track to outsource working on master document to dedicated, parallel and interactive Writer instance. This instance uses user profile dedicated to it. Before this user profile got created only one was used: profile created by LO installer.
In general, except for mentioned runtime stability issue, said roughly Writer is stable (of course problems happen from time to time, so far those could be managed). Current writer crashes is the major pain.

The workaround mentioned was found because interchangeable work in one or few subdocument then master leads to crashes. By means of parallel Writer instance I like to (at least) have crash impacts isolated to master document. Crash auto-restores succeed fortunately every time however they are costly because the placement and size of all windows (inclusively navigator sidebar) go crazy after crash restore and crashes happen to be frequent.

Second user profile was created while all Writer sessions were closed.
SafeMode2 Archive user profile didn’t deliver satisfying results hence as second approach
the second profile was created in shell, cp -r <original> <clone>.
The aim is to have at the initial point of time same user experience in second instance as in primary one. Over time they will of course diverge, however as of time being I don’t identify a problem for my work at this point.
Second instance is started from shell cli, soffice -env:UserInstallation=file://<second profile path> --writer
Proceeding of establishing second independent instance was found under support of DeepWiKi Devin.

As of time being the pain is that I need to install used extensions, the number of those is not high, mentioned reference/citation manager, few dictionaries, template changer which as for this write work I didn’t need to use so far.

Q. What will be best proceeding to install extensions in the new additional Writer instance?

Interesting inputs to be found in DeepWiki page for Zotero LibreOffice Integration, e.g. the Architecture. I will look for if helpful information can be found. Eventually logic crucial for workaround implementation is visible not until one navigates to Zotero app itself.

The best procedure to install extensions is with the extension manager.
It is best to install one by one and restart LibreOffice each time an extension is installed.

Mission primary extension communicates to external app running in parallel to Writer instance/-s. I think it is easy to run onto effects of version mismatch extension versus its peer app.

Furthermore, I am not sure if Writer extension offered on LibreOffice extensions marketplace (in its current version) matches Zotero 8.0.4 well.