The nation of shopkeepers makes plenty of money;
In an attempt to strike back at the British blockading France, Napoleon forbade all trade with Britain by the French and their allies/protectorates. This did far more damage to his empire than to Britains, turning states against him, damaging the economy, and eventually drawing France into its most disastrous campaigns in Iberia and Russia. Was not issuing his Berlin and Milan decrees just not an option? The embargo was largely ineffective against the British, so would Napoleon have been better served just securing his position on the Continent post Fourth Coalition than trying to strike back at the British?
The nation of shopkeepers makes plenty of money; the nation of
la gloire remakes the Continent in its image. Austria and Prussia presumably get along to go along in 1806, given that after the 2nd Coalition, they were anyway (Treaty of Luneville was signed in 1801, and Amiens followed in 1802, so even the British were on-board with peace for a time).
At some point later in the decade or the next, when the French rub up against the Russians (and/or possibly the Turks), or vice versa, there's another war and the British fund the Russians.
At that point, however, the French may have had enough time to recover from the Revolutionary period's instability and be able to muster the economic and demographic strength to hold off the Russians in the east while striking decisively at Britain in the west - the adoption of steam technology will have a great deal to do with that, of course.
With luck (for the French) the British collapse and France reasserts its primacy over the eastern Atlantic; with luck (for the British), it turns into another grinding stalemate, except with more advanced technology.
The biggest impact may be in the rest of the world; if the Iberian powers hold it together that would have an impact on Latin America, although the swing towards independence among the "American" elites was well underway by the beginning of the Nineteenth Century.
The same holds true for the Turks, Africa, and Asia. A more multipolar world in the mid-to-late Nineteenth Century, absent Europe's economic relative prominence, is an interesting one.
Best,