So the wiki page is best removed ?
Like Random Agent Spoofer, Self-Destructing Cookies was not ported to the
WebExtensions API, the only one Firefox (and derivatives such as Abrowser) 47
and later support.
I think you made a typographical error and meant Firefox 57 (Quantum) instead
of Firefox 47.
See
https://trisquel.info/en/forum/install-extension-link-wiki-page-abrowser-addon-random-agent-spoofer-not-working-me#comment-134181
It gives me the error message:
"The add-on downloaded from this site could not be installed because it
appears to be corrupt"
Should this wiki-page be updated?