ubuntu(firefox):How to fix "this addon could not be installed because it has not be vireified"
2016-09-07 10:52
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1.open the firefox.
2.insert into the url with ->
-> about:config
3.search the words -> xpinstall.signature.required
4.then set the value from TRUE to FALSE
2.insert into the url with ->
-> about:config
3.search the words -> xpinstall.signature.required
4.then set the value from TRUE to FALSE
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