The first thing I do on "milestone" releases is to check the websites that have not worked on Pale Moon up to that time (which led me to the issue with start.me - as I was removing link "warning not to use" text for websites that have apparently been fixed).
On a side note: safeway (safeway.com) still fails to login and Social Security (https://secure.ssa.gov/myssa/myhub/ still renders a blank page after submitting security process), however other sites (so far) appear to now work (i.e. Savemart [entire page appears to render correctly], CVS [images now display) so some good thankfully, but still some bad....
As the subject states - if I do a right-click context menu (to edit any link in any widget) the scrolling function for the page is disabled (there is a flash of the page and then all "scrolling" become disabled). Both the browser scroll function on the left of the page as well as mouse (middle button) scrolling functions fail to work). Fortunately, I can click on anything on the page however and the scrolling function once again works.
So what it comes down to is the right-click context menu edit functions are unusable (in fact the functions, list of edit options, does not display at all). The fact the right-click function list of edit features fails to render (resulting in a scroll function lockup) suggests that because there would appear to be an issue with Pale Moon displaying the right-click menu of edit options this failure to render the edit option list locks-up the scrolling function. Fortunately doing anything else reinstates the scrolling function.
There is another option to edit llnks in Widgets (but is not as convenient), because this other method involves accessing all the links so the convenience of simply editing the one link via using the right-click context menu to edit the one specific link is unfortunately no longer available do to this issue with (presumably) this new release.
I will add, that I can't say for certain at what point this issue may have arisen - as I don't edit links that often (needed to do so now to change the text for the link to remove warning messages to not use links that didn't previously work prior to this milestone release). So I can't actually be that certain when exactly this issue first arose (as I have probably not used the right-click context menu throughout many past Pale Moon releases).
If anyone has not yet updated to the "Milestone" release - please test the right-click (edit) context menu for Widget links, BEFORE UPDATING to see if it works!!!!!