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https://about.downthemall.org/4.0/?cur=4.2 has taken over my Firefox and won't ;et me do anything else. On opening Firefox I get "...Firefox can’t find the file at jar:file:///C:/Program Files/Mozilla Firefox/browser/omni.ja!/chrome/en-US/locale/branding/browserconfig.properties...." then after a few seconds, a second tab opens on site - https://about.downthemall.org/4.0/?cur=4.2
Chosen solution
That is usually a problem with the Homepage setting.
You can check the homepage setting.
- Options/Preferences -> Home: Home
- https://support.mozilla.org/en-US/kb/how-to-set-the-home-page
Firefox supports multiple homepages separated by '|' (pipe) symbols.
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Disable DownThemAll! Then contact their support.
Chosen Solution
That is usually a problem with the Homepage setting.
You can check the homepage setting.
- Options/Preferences -> Home: Home
- https://support.mozilla.org/en-US/kb/how-to-set-the-home-page
Firefox supports multiple homepages separated by '|' (pipe) symbols.
As suggested, found problem as a 'custom home page' URL. Deleted and hasn't come back after removing the 'add-on' as well