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the most recent firefox download ate my yahoo toolbar. can my software be regressed prior to this change?

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my yahoo and zynga toolbars has disappeared. the newest upgrade of Firefox is not compatible with toolbars. how can this be remedied? can the software be regressed to a working state prior to this upgrade?

my yahoo and zynga toolbars has disappeared. the newest upgrade of Firefox is not compatible with toolbars. how can this be remedied? can the software be regressed to a working state prior to this upgrade?

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This knowledge base article should help Installing a previous version of firefox

Note that previous versions will only be supported for a limited time. You should consider asking Yahoo and Zynga to release updates for those toolbars to make them compatible. If enough people ask, they will update the software.

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thank u grease money; however, if Firefox makes an upgrade then it seems reasonable & prudent that it is Firefox's initial responsibility to create compatible software with yahoo & zynga.