For those unfamiliar with URL Lister, its a firefox add-on that shows the URLs of all the open tabs in a textarea so that it can be copied easily. It is my first firefox add-on.
Unfortunately, there is a problem with the mozilla add-ons listing page – I cannot install the extensions using that page. I am getting this error…
Firefox could not install the file at https://addons.mozilla.org/en-US/firefox/downloads/file/32487/url_lister-1.1-fx.xpi because: Invalid file hash (possible download corruption) -261
However, you can right click the ‘Add to Firefox’ button and choose ‘Save Target As’ and download the file without any issues. Then you can install the extension by dragging the downloaded file into a firefox window. That works perfectly – but not the direct install method.