What Supertramp83 means is to type "about:config" in ABrowser's address bar,
whereupon a scary popup appears with a message to the effect that my warranty
might become void, but I proceeded anyway and was faced with an impressively
long list of choices, of which "javascript.enabled--->true" was one. I
selected that line with a right click and was presented with a short list of
choices, of which "toggle" was the obvious selection to make.
That cured my problem.
The only wrong "pill" that I tried first was to explore the /etc/abrowser
folder, which contains "syspref.js" but that was an utterly unpopulated file.
Then a Google search on "about:config javascript.enabled ---> true" got me
back on track.
Thanks ! It's been a learning experience.