On the topic of language. I wonder if we should change the button tooltip text from > Switch to the mail tab to > Switch to the mail space Both line up with the current behaviour. The first might be closer to well known concepts in Thunderbird, but I like the second because: + It means we have more references to the word "space" within the "Spaces Toolbar" itself, which would help users understand its name and use. + "**the** mail tab" is less clear when there are no existing tabs, or there is more than one tab for the space. + The second one's wording would continue to work when or if clicking a button doesn't open a new tab or move to an existing tab, but just changes the content of the current tab.
Bug 1665511 Comment 64 Edit History
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On the topic of language. I wonder if we should change the button tooltip text from > Switch to the mail tab to > Switch to the mail space Both line up with the current behaviour. The first might be closer to well known concepts in Thunderbird, but I like the second because: + It means we have more references to the word "space" within the "Spaces Toolbar" itself, which would help users understand its name and use. + "**the** mail tab" is less clear when there are no existing tabs, or there is more than one tab for the space. + The second one's wording would continue to work when or if clicking a button doesn't open a new tab or move to an existing tab, but just changes the space.