Clicking on link in thunderbird a new instance of opera will be opened
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sorosch last edited byHello, i surf with opera and as e-mail-client thunderbird. I have one instance of opera open and are surfing in the internet. Now i click on a link in thunderbird and a new instance of opera is opened. The link isn´t opened in the actual open instance of opera. When i switch back to firefox or edge as standard-browser and i click on a link in thunderbird the link is opend in the actual open instance of firefox or edge. Someone an idea, why clicking on a link in thunderbird a new instance is of opera will be opened? Thank you very much 
 Best regards
 George
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sorosch last edited byNo - i believe this has nothing to do with Thunderbird. I work under Windows 10. I tried several things: - 
i switched in Windows 10 the standard app options to Firefox or Edge and everything work normal. Everytime i click on a link in an email-programm only one instance will be opened - if one instance of firefox or edge is acuall open then the link will be opened in the open instance in another tab --> everything works correct. 
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Now i switch back on the standard app options in Windows to opera - i have the problem: one instance of opera is open and i click a link in Thunderbird, Outlook 2016 or Windows Mail - everytime, it doesn´t matter which e-mail-programm, a new instance of opera will be opened. When i click now on another link in any e-mail programm then the link will be opened in the just opened instance in another tab. When i click on more links in any e-mail programm then the links are opened in another tab in the same instance of opera. 
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There is no instance of Opera open. When i click on a link in any e-mail-programm, then a new instance of opera will be opened and the link is opened in a tab --> everythin correct. Nowi click on another link in any e-mail-programm the link will be opened in the same instance of opera in another tab --> everythin works correct. 
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I tried this on another computer. Here everythin works correct. No problem with opera. 
 I have only the problem, that when opera is aöready open - a new link will be opened. I believe that has nothing to do with any e-mail-program. An option in Windows? Or Opera? But what option? Have someone any idea? What option could this be? 
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sorosch last edited byI think i have the reason for the problem: I open opera with the option: --user-data-dir=D:\Opera_settings And when i click on a link in an e-mail-program the "standard" folder for settings is opened. So for opera this is a new instance. Is there another option in opera changing the user-dir? I find nothing in the windows settings for standard-apps or in Thunderbird to change this? Any idea? 
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burnout426 Volunteer last edited byYou can try setting it on registry so your custom profile folder will be used even if Opera isn't started with the customised short-cut. In this case, I think you'd have to edit the commands in these keys: HKEY_CURRENT_USER\SOFTWARE\Classes\http\shell\open\command HKEY_CURRENT_USER\SOFTWARE\Classes\https\shell\open\commandMaybe the HKEY_LOCAL_MACHINE ones too/instead or: HKEY_CLASSES_ROOT\http\shell\open\command HKEY_CLASSES_ROOT\https\shell\open\commandYour changes will be overwritten though the default browser for those is ever modified. You might be able to edit: HKEY_CLASSES_ROOT\OperaDeveloper\shell\open\commandfor example instead, so that when Opera is set as the default browser again, all the commands in the other keys are updated too. For stable Opera, that might be: HKEY_CLASSES_ROOT\Opera.Protocol\shell\open\commandThere are others besides Opera.Protocol like Opera.HTML for .html files. Always look at the command though first. Some of the keys might be for old Opera 12. Basically command-line options don't help much except for shortcuts unless you change them in the registry too. If you can specify the user data path in a file that opera.exe can read (maybe look at chrome configuration docs), that'd be better.