Outlook webpage refreshes whenever emails with attachments are opened or writing new emails

Had the same issue (Chrome 134.0.6998.36 and previous version) but worked in incognito.
Relogging seems to fix the bug.

This is the answer.

On Chrome go to the three dots in the top right corner click on it and go to delete browsing data.

Choose to delete it for the last 24 hours and that should be enough to fix the problem.

You will have to sign back into outlook but then it seems to work.

Unfortunately, Edge has switched from their own proprietary engine (Trident? For IE /Edge Legacy) to Chromium, so the Chrome/Edge will likely have similar issues for email. The difference might be what's cached as clearing the cache has seemed to help fix the issue temporarily.

Firefox is one of the sole remaining direct competitors to Chromium (Google's open source browser engine that Chrome & Edge are built upon) that is built on its own engine (Gecko), so that might be why you're having more success on Firefox. Also, I cannot speak to how well Edge is geared towards Linux OSes, be it Ubuntu, Mint, or other variants, but I would assume all other functionality is pretty well great based on how Microsoft allows WSL (Windows Subsystem for Linux) code to run on Windows.

I think the biggest factor is the webmail app itself loaded into any browser, because neither of the Outlook Classic or Outlook New applications have this issue at all. It's shocking so many still use the webmail version of Outlook instead of a robust and capable application.

I work from Ubuntu 24.04.2 Desktop, and I have seen that from the MS Edge browser installed on this Linux, their apps too frequently crash, but when I open the MS Apps via Chromium browser, the MS Apps are more stable.

Unfortunately, today, Outlook also stopped working from the Chromium browser, because I could not reply to emails, and the Outlook app was reloading when I attempted to do simple things, such as reply to emails or accept meetings.

I don't use Firefox browser frequently, but I gave it a chance today, because the MS Edge and Chromium browsers were not working properly with the MS Apps. After some testing, I was surprised to see everything working correctly from this Firefox browser.

The following are the details of what I have currently:

❯ lsb_release -a No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 24.04.2 LTS
Release:        24.04
Codename:       noble

❯ sudo dpkg -l chromium-browser
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name             Version           Architecture Description
+++-================-=================-============-========================================================
ii  chromium-browser 2:1snap1-0ubuntu2 amd64        Transitional package - chromium-browser -> chromium snap

❯ sudo dpkg -l "microsoft-edge*"
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                  Version         Architecture Description
+++-=====================-===============-============-=================================
ii  microsoft-edge-stable 133.0.3065.92-1 amd64        The web browser from Microsoft

❯ sudo dpkg -l firefox
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version           Architecture Description
+++-==============-=================-============-==============================================
ii  firefox        1:1snap1-0ubuntu5 amd64        Transitional package - firefox -> firefox snap