Websites Supported:

// @match       https://www.ptt.cc/bbs/*
// @match       https://www.pttweb.cc/*
// @match       https://disp.cc/ptt/*
// @match       https://disp.cc/b/*
// @match       https://hotptt.com/*
// @match       https://moptt.tw/p/*
// @match       https://ptthito.com/*
// @match       https://webptt.com/*
// @match       https://pttweb.tw/*
// @match       http://www.ucptt.com/*
// @match       https://www.ucptt.com/*
//
// @match       https://pttent.com/*
// @match       https://pttgame.com/*
// @match       https://pttdigit.com/*
// @match       https://pttlocal.com/*
// @match       https://pttcomic.com/*
//
// @match       https://webptt.findrate.tw/bbs/*
//
// @match       https://www.ptt.cc/ask/over18?from=*
//

Website NOT supported:

  https://ptt.reviews/HatePolitics/E.w1rS970orKqI
https://www.ptt666.com/M.1551680529.A.759.html

Sample URLs:

supported(1):

• https://www.ptt.cc/bbs/C_Chat/M.1684501378.A.9F2.html

supported(2):

• https://www.pttweb.cc/bbs/C_Chat/M.1684501378.A.9F2
• https://moptt.tw/p/C_Chat.M.1684501378.A.9F2
• https://ptthito.com/c_chat/m-1684501378-a-9f2/
• https://webptt.com/m.aspx?n=bbs/C_Chat/M.1684501378.A.9F2.html
• https://pttweb.tw/C_Chat/M.1684501378.A.9F2
• http://www.ucptt.com/article/C_Chat/1684501378/9F2

supported(3):

• https://disp.cc/ptt/C_Chat/1acPSKqZ
• https://hotptt.com/j3pu5u01ag

supported(4):

• https://disp.cc/b/ott/cpKM
• https://disp.cc/b/Gossiping/dyaG

supported(over18):

• https://www.ptt.cc/ask/over18?from=%2Fbbs%2FGossiping%2FM.164594###4.A.1E4.html

supported (no menu option):

• https://pttent.com/movie/M.1548573736.A.DD4.html
• https://pttgame.com/lol/M.1476373373.A.239.html
• https://pttdigit.com/macshop/M.1551692551.A.8EA.html
• https://pttlocal.com/tainan/M.1551683492.A.63D.html
• https://webptt.findrate.tw/bbs/Marginalman/M.1691851187.A.905.html

not supported:

• https://ptt.reviews/HatePolitics/E.w1rS970orKqI
• https://www.ptt666.com/M.1551680529.A.759.html