Disable Touch Events
Touch events in browsers can cause issues within the document viewer in the web. This is most typically the case when users seemingly can't draw or edit annotations in the web viewer.
This issue is most commonly found to happen in Chrome, but may also happen in Firefox. To remedy this, touch events need to be turned off.
Step-by-step guide
For Chrome
Open Chrome
Navigate to chrome://flags
Search for "Touch Events API
Disable the flag and restart Chrome
For Firefox
Open Firefox
Navigate to about:config
If prompted for authorization, hit "I Accept the Risk"
Search for "dom.w3c_touch"
Find the "Touch Events Enabled" Preference
Double click and change the integer value to 0
Hit "Ok" and restart Firefox
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