firefox - How do I check if firebug is installed with javascript? -

here described how check if firebug installed checking if image of firebug exists: http://webdevwonders.com/detecting-firefox-add-ons/

but seems bit outdated, cause images uses there don't exist anymore in firebug.

the firebug chrome.manifest looks like:

content firebug content/firebug/ contentaccessible=yes ... 

but in whole addon find 1 png now, , placed in rootfolder of addon. other content accessible, example: chrome://firebug/content/trace.js

ho

so, in gerneral:

how make image accessible resides inside firefox sdk addon?

i program addon , want make image ok.png available javascripts in firefox.

i added image in data folder , added chrome.manifest

content response-timeout-24-hours data/ content response-timeout-24-hours data/ contentaccessible=yes 

but no way call via url like

chrome://response-timeout-24-hours/data/ok.png 

how paths belong together? relative which?

i created bug report here.

so if want make add-on detectable need approach:

you can use pagemod attach content script wait message web-app , "respond" sending message app. know if don't receive response, addon not installed. check out documentation more details:

https://developer.mozilla.org/en-us/add-ons/sdk/high-level_apis/page-mod

i used make my add-on detectable.