I want to replace the emailtemplates of a survey. as only superadmins should be able to change the default texts I wanted to get the texts in the plugin configuration.

later on on every save of the survey it's mail-templates should be replaced.

I got the fields to enter the value in the plugin configuration and it's content is saved in the table lime_plugin_settings.

as the mail templates are stored in lime_surveys_languagesettings I tried to hook into the save event.

$this->subscribe('beforeSave');
$this->subscribe('beforeSurveyLanguagesettingSave');

but those functions got not triggered

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on the other side I noticed:
every time I save the survey, the mail templates are wrapped in a HTML page:
and with each save another line is inserted. (my text stays in the body-tag).

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hooking into beforeSurveySave works without problems, but I can't hook into the other ones to modify the mail templates.

Although it is a weird behaviour to wrap text in a full html structur, the insertion of the Google analytics calls appears only with our 'old' firefox. In our company we have not the newest version, but an version with special extended LTS: 60.6.1esr (64-Bit)
Here I have some Javascript errors, I don't get with newest chrome (73.0.3683.103 (64-Bit))
I don't know wether this is the cause of misbehaviour, in chrome I only get a HTML/BODY-wrap with no GA-javascript. but that also seems strange.

At last I found my error:
the event no longer is named 'beforeSave' but 'beforeModelSave'

beforeModelSave is for all models : beforeSurveyLanguageSettingSave must work for SurveyLanguageSetting model only.

(see the Capitalize)

else beforeSave is the event LimeSurvey use fro Yii : it never work for LimeSurvey plugin

Else about _gaUserPrefs : did you try deactivate all FireFox plugin ?