I have two Tesla cars linked as fleet vehicles, and like to have bookmarks to go directly to the one I'm interested in seeing. The bookmark works while the login session is active, but after some time the bookmark will always fail.

This failure is due to TeslaFi having to re-authenticate after session expiration (automatically, via "Remember Me" feature). This re-authentication discards the fleet variable from the original URL, when instead it could be maintained and carried though. After this, the URL works reliably while the session is active.

It'd be very appreciated if there was a consistent way to link directly to specific fleet vehicles, which does already exist, but is broken after session expiration.

An example would be ‘Changed to winter tyres’. Then a search between tags would show the average consumption among other things.
Or it could be the start and end of a journey. It may look similar to Road trips but I think it is a complementary to it. 

https://teslafi.com/firmware shows Previously Installed Version and Next Version Installed for each version of the firmware. However it only displays such information for recent versions/versions with cars, i.e. only considers current and one previous version of each car. 

Break down by country/car/etc would be nice, too, but that is secondary.

Check e.g. https://imgur.com/a/QkuZf1J for examples.

The question I want to answer at this point is "how many vehicles were added to the beta in the last x months, so just implementing such a report might be easier, but it would be nice to have all the upgrade paths available. The database has the information, as if you click on any single vehicle, it has the whole history. 

Please add unicode support to TeslaFi website to display vehicle names correctly for those vehicles that are using character sets from a language other than English.

It would be good if the driving summary page had similar details to the charging summary page. 

Could you please add $/km for the last x week up to 52? Or $/km for the x km? Very useful if there are a mix of home vs super charging. Maybe option to include or exclude free charge session. Please use odometer for calculations not distance added during charge. 

I would like to see the battery level chart on the main page use a 0-100 scale. Could you please add an option to change it to this absolute scale verse the current relative scale it uses today.

I just sold my Model X and I'm waiting for a new Tesla. I'd like to have a comprehensive vehicle report memorializing my whole ownership stats on the sold vehicle before I delete it. I know I can go to different areas of TeslaFi and print individual reports but it would be great if I could select a date range and see everything in one comprehensive report. An alternative would be to have a reports page where I could select which individual reports I'd like.

While my use is for a sold vehicle the reporting would also be useful for doing regular end of year reports that folks might need for various reasons such as taxes, employer, etc.

Could the State of Charge be added to the Plug In Reminder EMail pls?

I had a reminder set for 80% (and got Email) but yesterday went to car and found that it was at 20% because I had not plugged in

I had ignored the Email as I had returned very low the previous day, and my overnight charge period is (deliberately) limited to my "Cheap Rate Overnight" ... so I hadn't expected it to actually reach 80%.  The SoC of 20% in the Email Title would have got my attention!

please add a charging speed graph for similar cars for the whole fleet.

charging speed over SoC

would be perfect if I can see my car in comparison to cars similar to mine. (Model / Battery type)