Rob--W · July 27, 2018 21:06
diff --git a/contextMenus-context-usages.txt b/contextMenus-context-usages.txt
 $ ### This is a rough estimate of the values of the "contexts" array in extensions,
 $ ### presumably used as values in the contextMenus/menus.create/update API.

 $ ### First, we check whether the number of reported occurrences is significant,
 $ ### by checking the number of "contexts:" strings that are not followed by an array.
 $ ### As the first checks show, only 10% of the matches are not arrays,
 $ ### (so they are variables, expressions or not part of the menus API).
 $ ### The other 90% are arrays, and significant.

 $ ### LIMITATIONS
 $ ### This analysis only accounts for object literals, and not for dynamic assignments,
 $ ### such as foo.contexts = [...].

 $ ### METHODOLOGY
 $ ### First, download all public extensions from AMO, using https://github.com/cr/webextaware
 $ ### At the time of analysis (27 july 2018), there are 15.2k extensions.
 $ ### I selected all extensions whose manifest.json contained "menus" or "contextMenus" (quotes included).
 $ ### The directory structure generated by "webextaware unzip" is number/hash/hash/{manifest.json,...}

 $ ### The number of unique extenson listings that use the contextMenus/menus APIs
 $ ls -ld * | wc -l
 2096

 $ ### The number of extensions (including multiple versions) that use the APIs
 $ ls -ld */* | wc -l
 2992

 $ ### The number of extensions where "contexts:" is not followed by an array.
 $ grep -r --include='*.js' -oPaz 'contexts["'"'"']?\s*:\s*\K[^\[\s]' -l | grep -oP '^[0-9]+\/[a-f0-9]+' | sort | uniq | wc -l
 230

 $ ### The number of files where "contexts:" is not followed by an array
 $ grep -r --include='*.js' -oPaz 'contexts["'"'"']?\s*:\s*\K[^\[\s]' -l | wc -l
 257

 $ ### The number of occurrence of "contexts:" not followed by an array
 $ grep -r --include='*.js' -oPaz 'contexts["'"'"']?\s*:\s*\K[^\[\s]' | tr '\0' '\n' | wc -l
 836


 $ ### The number of files where "contexts:" is followed by an array
 $ grep -r --include='*.js' -oPaz 'contexts["'"'"']?\s*:\s*\K\[\s*[^\]]+\]' -l | wc -l
 2463



 $ ### The number of extensions where "contexts:" is followed by an array
 $ grep -r --include='*.js' -oPaz 'contexts["'"'"']?\s*:\s*\K\[\s*[^\]]+\]' -l | grep -oP '^[0-9]+\/[a-f0-9]+' | sort | uniq | wc -l
 2349

 $ ### The number of occurences of "contexts:" followed by an array
 $ grep -r --include='*.js' -oPaz 'contexts["'"'"']?\s*:\s*\K\[\s*[^\]]+\]' | tr '\n' ' ' | sed 's/\x00//g; s/\s//g; s/[0-9]\+\/[^:]\+:/\x00/g; s/^\x00//; s/\x00/\n/g; s/"/'"'"'/g' | wc -l
 7406

 $ ### The exact values of the arrays after "contexts:" (without whitespace)
 $ grep -r --include='*.js' -oPaz 'contexts["'"'"']?\s*:\s*\K\[\s*[^\]]+\]' | tr '\n' ' ' | sed 's/\x00//g; s/\s//g; s/[0-9]\+\/[^:]\+:/\x00/g; s/^\x00//; s/\x00/\n/g; s/"/'"'"'/g' | sort | uniq -c | sort -rn
   1652 ['selection']
   1607 ['all']
    607 ['link']
    534 ['browser_action']
    407 ['image']
    406 ['page']
    253 ['tab']
    240 ['editable']
    162 [context1,'browser_action']
    139 [context]
     60 ['tools_menu']
     45 ['page','tab']
     44 ['selection','editable']
     37 ['selection','link']
     36 ['page','frame','selection','link','editable','image','video','audio']
     35 ['page','link']
     33 [_0x1b65('0x31'),_0x1b65('0x32')]
     32 ['browser_action','page_action']
     30 ['link','page','selection']
     30 [_0x49d0[101]
     28 ['frame']
     25 ['image','video','audio']
     25 [_0xf372('0x6')]
     23 ['selection','page']
     23 ['link','image']
     22 ['link','selection']
     21 ['video']
     21 ['page_action']
     21 [`page`]
     21 ['all','tools_menu']
     19 ['video','link']
     18 ['tab','all']
     18 ['page','frame']
     18 ['audio','video','link']
     18 ['audio','link']
     18 ['all','tab']
     16 ['link','page']
     15 [e]
     15 ['bookmark']
     14 ['video','audio']
     14 ['page','selection']
     14 ['link','audio','video']
     13 ['page_action','browser_action']
     12 ['video','tab','page']
     12 [context==='reset'?'image':context]
     12 [context0,'browser_action']
     12 [browser.menus.ContextType.ALL,browser.menus.ContextType.TAB]
     12 ['all','page','frame','selection','link','editable','image','video','audio','launcher','browser_action','page_action']
     11 ['page','editable','frame']
     11 ['editable','password']
     11 ['audio']
     10 ['password']
     10 ['page','selection','link']
     10 ['page','selection','image','link']
     10 ['editable',_0x1b65('0x32')]
     10 [_0x1b65('0x31'),'password']
      9 ['page','selection','link','editable','image','video','audio']
      9 ['page','link','image']
      9 ['page','editable']
      9 [c]
      9 [browser.contextMenus.ContextType.EDITABLE,browser.contextMenus.ContextType.FRAME,browser.contextMenus.ContextType.IMAGE,browser.contextMenus.ContextType.LINK,browser.contextMenus.ContextType.PAGE,browser.contextMenus.ContextType.SELECTION]
      9 [browser.contextMenus.ContextType.EDITABLE,browser.contextMenus.ContextType.FRAME,browser.contextMenus.ContextType.IMAGE,browser.contextMenus.ContextType.LINK,browser.contextMenus.ContextType.PAGE,browser.contextMenus.ContextType.PASSWORD,browser.contextMenus.ContextType.SELECTION]
      9 ['browser_action','page','tab']
      9 [`browser_action`]
      9 [_0xcd9e[224]
      8 ['selection','link','image']
      8 ['page','browser_action']
      7 [type]
      7 [t]
      7 ['link','video','audio']
      7 ['image','video']
      7 ['image','link']
      7 [_0xa8c4bf]
      6 ['page','selection','image','link','all']
      6 ['page','frame','selection','editable','image','video','audio']
      6 [n]
      6 ['link','video']
      6 ['link','selection','editable']
      6 ['image','audio','video']
      6 [document,...]
      5 ['selection','link','editable','image']
      5 ['page','frame','selection','link','video','audio','image']
      5 [browser.contextMenus.ContextType.TAB]
      5 ['browser_action','page']
      5 ['audio','video']
      4 ['selection','link','page']
      4 ['selection','link','editable']
      4 ['selection','image']
      4 ['page','selection','image']
      4 ['page','link','selection','image']
      4 ['page','image','link']
      4 ['page','frame','image']
      4 ['image','page']
      4 ['editable','page']
      4 [ctx]
      4 ['audio','editable','frame','image','page','password','selection','video']
      4 [_0x523f09[_0xf372('0x2b3')]
      3 ['\x73\x65\x6c\x65\x63\x74\x69\x6f\x6e']
      3 ['tab','page']
      3 ['selection','video','frame']
      3 ['selection','image','video','audio','link','page']
      3 ['selection','image','link']
      3 [prefs.video?'video':'',prefs.audio?'audio':'',prefs.link?'link':'']
      3 ['page','tab','selection']
      3 ['page'//'selection',//'link',//'editable',//'image',//'video',//'audio']
      3 ['page','image','selection','link']
      3 ['page','image','selection']
      3 ['page','image','link','selection']
      3 ['page','image']
      3 ['page','frame','selection','editable','video']
      3 ['page','frame','link','image','video','audio']
      3 [menu[4]
      3 ['link','selection','frame','page']
      3 ['link','editable','selection']
      3 ['link','audio','video','image']
      3 [`link`]
      3 ['+contexts.join(',')+']
      3 ['all'//'image']
      3 [_0xf372('0x34'),_0xf372('0xb'),_0xf372('0xc')]
      3 [_0xcd9e[160]
      3 [_0x4f85b9[_0xf372('0x61')]
      3 [_0x421c[152]
      3 [_0x18e0('0x6')]
      2 ['video','audio','image']
      2 ['tools_menu','browser_action']
      2 [sContext]
      2 ['page','selection','link','image','video','audio']
      2 ['page','frame','selection','link','editable','image','video','audio','page_action']
      2 ['page','frame','selection','link','editable']
      2 ['page','frame','selection','editable']
      2 ['page','editable','frame','link','image','video']
      2 ['page','browser_action','password']
      2 ['page','browser_action','editable']
      2 ['link','image','video','audio','selection']
      2 ['link','audio']
      2 ['editable','selection']
      2 ['browser_action','page','frame']
      2 [a[_0x3e1e('0x3a')]
      2 [a[_0x3e1e('0x16')]
      2 [_0xf372('0x38')]
      2 [_0x3bd84e]
      2 [_0x25e5e4[_0xf372('0x195')]
      2 [_0x18e0('0x3')]
      1 ['\x73\x65\x6c\x65\x63\x74\x69\x6f\x6e',_0xf372('0x34'),_0xf372('0xb'),_0xf372('0xc')]
      1 ['video','image']
      1 [TYPES_CONTEXT.LINK]
      1 [service.contextmenu]
      1 ['selection','image','video','audio']
      1 [prefs.video?'video':'',prefs.audio?'audio':'']
      1 ['page','tools_menu']
      1 ['PAGE','TABS']
      1 ['page','selection','link','image','video']
      1 ['page','selection','link','browser_action','page_action']
      1 ['page','selection','editable','link','tab']
      1 ['page','selection','editable','image','video','audio']
      1 ['page','password','editable']
      1 ['page','link','selection']
      1 ['page','image','frame','editable','video','selection']
      1 ['page','frame','selection','link','editable','image']
      1 ['page','frame','selection','editable','video','audio']
      1 ['page','frame','selection']
      1 ['page','frame','link']
      1 ['page',//firefox-only:'tab',]
      1 ['page','editable','password']
      1 ['page','editable','link']
      1 ['page','browser_action','link']
      1 [onwhat]
      1 [_oContexts[_0x1882b4]
      1 ['link','selection','image','video','audio']
      1 ['link','page','tab']
      1 ['link','browser_action']
      1 ['link','audio','video','selection']
      1 [(IS_BUTTON_ON_TOOLBAR?'browser_action':'page_action')]
      1 [$intern_57,$intern_58,$intern_59,$intern_60,$intern_61,$intern_62,$intern_63]
      1 ['frame','page','selection','video']
      1 [e['\x68\x41\x6f\x54\x73']
      1 [`editable`]
      1 [e.ContextType.selection,e.ContextType.link]
      1 [contexts[j]
      1 [contexts[i]
      1 ['audio','image','link','page','tab','video']
      1 ['audio','editable','frame','image','link','page','page_action','password','selection','tab','video']
      1 ['all','tab','tools_menu']
      1 ['all','selection']
      1 ['all','page_action']
      1 ['all',]
      1 [a[_0x61c7('0x53')]
      1 [a[_0x4d17('0x41')]
      1 [a[_0x0208('0x1d')]
      1 [_0xf372('0x6'),'\x70\x61\x67\x65',_0xf372('0xb'),_0xf372('0xc')]
      1 [_0xf372('0x6'),_0xf372('0x34'),_0xf372('0xb'),'\x74\x61\x62']
      1 [_0xf372('0x6'),_0xf372('0x34'),_0x4521db[_0xf372('0x9e')]
      1 [_0xf372('0x6'),_0x523f09[_0xf372('0x2b2')]
      1 [_0xf372('0x34'),_0xf372('0xb'),'\x74\x61\x62']
      1 [_0x630c('0x18')]
      1 [_0x5c98('0x34')]
      1 [_0x5288e5['\x6e\x41\x45\x50\x59']
      1 [_0x5288e5[_0xf372('0x220')]
      1 [_0x523f09[_0xf372('0x2b2')]
      1 [_0x4d2555]
      1 [_0x3d4782]
      1 [_0x3c2ed8[_0xf372('0x24a')]
      1 [_0x38b6('0x2')]
      1 [_0x1b65('0x2d')]
      1 [_0x166e95]
      1 [_0x12bc76[_0xf372('0x1d7')]