What is this Firefox error?

So I am on firefox going on sites an so, but in some sites it does’t load everything. When I check on ‘TOOLS’ on firefox and go to error console, it has a lot of warning signs saying stuff like “uknown property ‘_width’.Declaration Dropped.”

Answer #1

nope sorry…I think you should update your version though…if that doesnt work uninstall and install firefox again… but im not sure itll work because I’ve never seen that error before…

Answer #2

its probably a HTML error but im not quite sure…it also looks like PHP code… I’ve never encountered it before but I think it might be from your connection

Answer #3

can you tell me how to fix it, please?

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