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firefox as default browser

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Microsoft tells me that I have to make IEX the default browser, else I would not be able to use Windows online help within MS Office. I rather prefer Mozilla. So, when opening links from within Outlook mails, IEX is used, with all the associated negative consequences (no cookie protection, no bookmarks, no plug-ins, etc.) Any workaround to solve this dilemma?

Microsoft tells me that I have to make IEX the default browser, else I would not be able to use Windows online help within MS Office. I rather prefer Mozilla. So, when opening links from within Outlook mails, IEX is used, with all the associated negative consequences (no cookie protection, no bookmarks, no plug-ins, etc.) Any workaround to solve this dilemma?

Chosen solution

Fool Outlook with a IE user-agent, see the addon below.

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Chosen Solution

Fool Outlook with a IE user-agent, see the addon below.

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..it seems that the nightmare is gone. Thanks a lot.