We are experiencing some problems with browsers and editing the website using Episerver.
According to the requirements for CMS 7.5:
Browser for editing
Any of the following is required:
For the versions thereafter:
CMS 11, the latest major release, supports:
CMS 10 supports:
CMS 9 supports:
CMS 8 supports:
* For Commerce Manager, see product-specific requirements.
** Due to fast release cycles, we only support the two latest versions for these.
Looks like you'd need to perform quite a substantial upgrade to guarantee support on the latest browsers. I think your IT department may have to install a legacy browser for use with editing.