Hi Folllowing some advise from https://www.webpagetest.org/ and https://lighthouse-dot-webdotdevsite.appspot.com/ for optimizing koha. I´ve found small issues that I was able to fix locally and some, well,are too complex fro my knowledge and guess require changes in koha code. Note that lighthouse detected that jQuery@3.4.1 <https://snyk.io/vuln/npm:jquery?lh=3.4.1&utm_source=lighthouse&utm_medium=ref&utm_campaign=audit> have two medium risk vulnerabilities. The issue I'm trying to fix is regarding the cache. I had y servier with no cache header so max-age was not setup. I´addedd header cache max-age 3600 public to apache header and now after two language changes I'm unable to change it again. If I clear my browser cache, completely disable cache header or wait the 3600 seconds, I can again change the language for two times. How can I avoid browser to cache only language change part? I guess there is a way to exclude from cache specific files. Regards Alvaro |----------------------------------------------------------------------------------------| Stay safe / Cuídate/ Reste sécurisé *7* Switch off as you go / Apaga lo que no usas / Débranchez au fur et à mesure. *q *Recycle always / Recicla siempre / Recyclez toujours P Print only if absolutely necessary / Imprime solo si es necesario / Imprimez seulement si nécessaire